main.star: remove sizespecializedmalloc builders

The experiment is now the default and the experiment will be removed in
Go 1.28.

For #80279

Change-Id: Ia9609de82ae184da838acba679490ee16a6a6964
Reviewed-on: https://go-review.googlesource.com/c/build/+/807000
LUCI-TryBot-Result: golang-scoped@luci-project-accounts.iam.gserviceaccount.com <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Michael Matloob <matloob@google.com>
diff --git a/generated/commit-queue.cfg b/generated/commit-queue.cfg
index a833476..c4a1824 100644
--- a/generated/commit-queue.cfg
+++ b/generated/commit-queue.cfg
@@ -21687,10 +21687,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-386-sizespecializedmalloc"
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-386-softfloat"
         disable_reuse: true
       }
@@ -21785,10 +21781,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-amd64-sizespecializedmalloc"
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-amd64-spectre"
         disable_reuse: true
       }
@@ -21824,11 +21816,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-amd64_c2s16-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-amd64_c2s16-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -21854,11 +21841,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-amd64_c3h88-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-amd64_c3h88-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -21934,10 +21916,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-arm64-sizespecializedmalloc"
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-arm64_c4ah72-perf_vs_oldest_stable"
         includable_only: true
         disable_reuse: true
@@ -21948,11 +21926,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-arm64_c4ah72-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-arm64_c4ah72-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -21973,11 +21946,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/security-try/gotip-linux-arm64_c4as16-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/security-try/gotip-linux-arm64_c4as16-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -57551,16 +57519,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-386-sizespecializedmalloc"
-        disable_reuse: true
-        location_filters {
-          gerrit_host_regexp: "go-review.googlesource.com"
-          gerrit_project_regexp: "^go$"
-          gerrit_ref_regexp: ".*"
-          path_regexp: "src/runtime/[^/]+"
-        }
-      }
-      builders {
         name: "golang/try/gotip-linux-386-softfloat"
         includable_only: true
         disable_reuse: true
@@ -57700,16 +57658,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-amd64-sizespecializedmalloc"
-        disable_reuse: true
-        location_filters {
-          gerrit_host_regexp: "go-review.googlesource.com"
-          gerrit_project_regexp: "^go$"
-          gerrit_ref_regexp: ".*"
-          path_regexp: "src/runtime/[^/]+"
-        }
-      }
-      builders {
         name: "golang/try/gotip-linux-amd64-spectre"
         includable_only: true
         disable_reuse: true
@@ -57759,11 +57707,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-amd64_c2s16-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/try/gotip-linux-amd64_c2s16-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -57789,11 +57732,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-amd64_c3h88-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/try/gotip-linux-amd64_c3h88-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -57905,16 +57843,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-arm64-sizespecializedmalloc"
-        disable_reuse: true
-        location_filters {
-          gerrit_host_regexp: "go-review.googlesource.com"
-          gerrit_project_regexp: "^go$"
-          gerrit_ref_regexp: ".*"
-          path_regexp: "src/runtime/[^/]+"
-        }
-      }
-      builders {
         name: "golang/try/gotip-linux-arm64_c4ah72-perf_vs_oldest_stable"
         includable_only: true
         disable_reuse: true
@@ -57925,11 +57853,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-arm64_c4ah72-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/try/gotip-linux-arm64_c4ah72-perf_vs_release"
         includable_only: true
         disable_reuse: true
@@ -57950,11 +57873,6 @@
         disable_reuse: true
       }
       builders {
-        name: "golang/try/gotip-linux-arm64_c4as16-perf_vs_parent-sizespecializedmalloc"
-        includable_only: true
-        disable_reuse: true
-      }
-      builders {
         name: "golang/try/gotip-linux-arm64_c4as16-perf_vs_release"
         includable_only: true
         disable_reuse: true
diff --git a/generated/cr-buildbucket.cfg b/generated/cr-buildbucket.cfg
index 7e52741..a73f980 100644
--- a/generated/cr-buildbucket.cfg
+++ b/generated/cr-buildbucket.cfg
@@ -21023,63 +21023,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.ci"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/ci-workers/gotip-linux-386-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/ci-workers/gotip-linux-386-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -22631,63 +22574,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.ci"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/ci-workers/gotip-linux-amd64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/ci-workers/gotip-linux-amd64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -23863,63 +23749,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.ci"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/ci-workers/gotip-linux-arm64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/ci-workers/gotip-linux-arm64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4ah72-perf_vs_release"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -304502,123 +304331,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-386-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat-build_go"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -307314,123 +307026,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre-build_go"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -309183,123 +308778,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.ci-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 40
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64-test_only"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -332805,63 +332283,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.security-try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/security-try-workers/gotip-linux-386-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/security-try-workers/gotip-linux-386-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -334175,63 +333596,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.security-try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/security-try-workers/gotip-linux-amd64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/security-try-workers/gotip-linux-amd64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -334683,63 +334047,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64_c2s16-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:c2-standard-16"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64_c2s16-perf_vs_release"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -335016,63 +334323,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64_c3h88-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:c3-highcpu-88"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64_c3h88-perf_vs_release"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -336078,63 +335328,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.security-try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/security-try-workers/gotip-linux-arm64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/security-try-workers/gotip-linux-arm64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4ah72-perf_vs_oldest_stable"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -336245,63 +335438,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64_c4ah72-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:c4a-highcpu-72"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4ah72-perf_vs_release"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -336522,63 +335658,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64_c4as16-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:c4a-standard-16"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4as16-perf_vs_release"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -403039,123 +402118,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc-build_go"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-386-sizespecializedmalloc-test_only"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat-build_go"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -405851,123 +404813,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-build_go"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-test_only"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre-build_go"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -407720,123 +406565,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-build_go"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-test_only"
-      swarming_host: "chrome-swarming.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.security-try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "security-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64-test_only"
       swarming_host: "chrome-swarming.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -428862,63 +427590,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/try-workers/gotip-linux-386-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/try-workers/gotip-linux-386-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -430232,63 +428903,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/try-workers/gotip-linux-amd64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/try-workers/gotip-linux-amd64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -430740,63 +429354,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64_c2s16-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:c2-standard-16"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64_c2s16-perf_vs_release"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -431073,63 +429630,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64_c3h88-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:c3-highcpu-88"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64_c3h88-perf_vs_release"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -432076,63 +430576,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "pool:luci.golang.try"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "coord_mode": {'
-        '    "build_builder": "golang/try-workers/gotip-linux-arm64-sizespecializedmalloc-build_go",'
-        '    "builders_to_trigger_after_toolchain_build": [],'
-        '    "num_test_shards": 4,'
-        '    "test_builder": "golang/try-workers/gotip-linux-arm64-sizespecializedmalloc-test_only"'
-        '  },'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 1,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "coordinator-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4ah72-perf_vs_oldest_stable"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -432243,63 +430686,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64_c4ah72-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:c4a-highcpu-72"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4ah72-perf_vs_release"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -432520,63 +430906,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64_c4as16-perf_vs_parent-sizespecializedmalloc"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:c4a-standard-16"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 4,'
-        '  "perf_mode": {'
-        '    "baseline": "parent"'
-        '  },'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      priority: 30
-      execution_timeout_secs: 43200
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64_c4as16-perf_vs_release"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
@@ -887554,123 +885883,6 @@
       }
     }
     builders {
-      name: "gotip-linux-386-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-386-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "386",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-386-softfloat-build_go"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -890366,123 +888578,6 @@
       }
     }
     builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-amd64-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-amd64"
-      dimensions: "machine_type:n1-standard-16"
-      dimensions: "os:Debian-11"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "amd64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-amd64-spectre-build_go"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-amd64"
@@ -892114,123 +890209,6 @@
       }
     }
     builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-build_go"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "build_mode": {},'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 2,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
-      name: "gotip-linux-arm64-sizespecializedmalloc-test_only"
-      swarming_host: "chromium-swarm.appspot.com"
-      dimensions: "cipd_platform:linux-arm64"
-      dimensions: "machine_type:t2a-standard-8"
-      dimensions: "os:Debian-12"
-      dimensions: "pool:luci.golang.try-workers"
-      exe {
-        cipd_package: "infra/experimental/golangbuild/${platform}"
-        cipd_version: "latest"
-        cmd: "golangbuild"
-      }
-      properties:
-        '{'
-        '  "bootstrap_version": "1.26.0",'
-        '  "env": {'
-        '    "GOEXPERIMENT": "sizespecializedmalloc"'
-        '  },'
-        '  "git_cache": "git",'
-        '  "go_branch": "master",'
-        '  "go_commit": "",'
-        '  "host": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "is_google": true,'
-        '  "mode": 3,'
-        '  "project": "go",'
-        '  "target": {'
-        '    "goarch": "arm64",'
-        '    "goos": "linux"'
-        '  },'
-        '  "test_mode": {},'
-        '  "test_shard": {'
-        '    "num_shards": 1,'
-        '    "shard_id": 0'
-        '  },'
-        '  "tools_cache": "tools"'
-        '}'
-      allowed_property_overrides: "go_commit"
-      allowed_property_overrides: "test_shard"
-      priority: 30
-      expiration_secs: 21600
-      wait_for_capacity: NO
-      caches {
-        name: "git"
-        path: "git"
-      }
-      caches {
-        name: "tools"
-        path: "tools"
-      }
-      service_account: "public-worker-builder@golang-ci-luci.iam.gserviceaccount.com"
-      experiments {
-        key: "golang.shard_by_weight"
-        value: 100
-      }
-      resultdb {
-        enable: true
-      }
-    }
-    builders {
       name: "gotip-linux-arm64-test_only"
       swarming_host: "chromium-swarm.appspot.com"
       dimensions: "cipd_platform:linux-arm64"
diff --git a/generated/luci-milo.cfg b/generated/luci-milo.cfg
index 70d05ce..4a5d7b6 100644
--- a/generated/luci-milo.cfg
+++ b/generated/luci-milo.cfg
@@ -113,11 +113,6 @@
     short_name: "nogreenteagc"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-386-sizespecializedmalloc"
-    category: "linux|386"
-    short_name: "sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-386-softfloat"
     category: "linux|386"
     short_name: "softfloat"
@@ -217,11 +212,6 @@
     short_name: "simd"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-amd64-sizespecializedmalloc"
-    category: "linux|amd64"
-    short_name: "sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-amd64-spectre"
     category: "linux|amd64"
     short_name: "spectre"
@@ -308,11 +298,6 @@
     short_name: "simd"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-arm64-sizespecializedmalloc"
-    category: "linux|arm64"
-    short_name: "sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-arm64_c4as16-perf_vs_release"
     category: "linux|arm64_c4as16"
     short_name: "perf_vs_release"
@@ -57585,9 +57570,6 @@
     name: "buildbucket/luci.golang.ci/gotip-linux-386-nogreenteagc"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-386-sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-386-softfloat"
   }
   builders {
@@ -58310,9 +58292,6 @@
     name: "buildbucket/luci.golang.ci/gotip-linux-amd64-simd"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-amd64-sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-amd64-spectre"
   }
   builders {
@@ -61833,9 +61812,6 @@
     name: "buildbucket/luci.golang.ci/gotip-linux-arm64-simd"
   }
   builders {
-    name: "buildbucket/luci.golang.ci/gotip-linux-arm64-sizespecializedmalloc"
-  }
-  builders {
     name: "buildbucket/luci.golang.ci/gotip-linux-arm64_c4as16-perf_vs_release"
   }
   builders {
diff --git a/generated/luci-scheduler.cfg b/generated/luci-scheduler.cfg
index 32fa302..d6ff9b6 100644
--- a/generated/luci-scheduler.cfg
+++ b/generated/luci-scheduler.cfg
@@ -5541,22 +5541,6 @@
   }
 }
 job {
-  id: "gotip-linux-386-sizespecializedmalloc"
-  realm: "ci"
-  triggering_policy {
-    kind: NEWEST_FIRST
-    max_concurrent_invocations: 5
-    pending_timeout {
-      seconds: 604800
-    }
-  }
-  buildbucket {
-    server: "cr-buildbucket.appspot.com"
-    bucket: "ci"
-    builder: "gotip-linux-386-sizespecializedmalloc"
-  }
-}
-job {
   id: "gotip-linux-386-softfloat"
   realm: "ci"
   triggering_policy {
@@ -5925,22 +5909,6 @@
   }
 }
 job {
-  id: "gotip-linux-amd64-sizespecializedmalloc"
-  realm: "ci"
-  triggering_policy {
-    kind: NEWEST_FIRST
-    max_concurrent_invocations: 5
-    pending_timeout {
-      seconds: 604800
-    }
-  }
-  buildbucket {
-    server: "cr-buildbucket.appspot.com"
-    bucket: "ci"
-    builder: "gotip-linux-amd64-sizespecializedmalloc"
-  }
-}
-job {
   id: "gotip-linux-amd64-spectre"
   realm: "ci"
   triggering_policy {
@@ -6245,22 +6213,6 @@
   }
 }
 job {
-  id: "gotip-linux-arm64-sizespecializedmalloc"
-  realm: "ci"
-  triggering_policy {
-    kind: NEWEST_FIRST
-    max_concurrent_invocations: 5
-    pending_timeout {
-      seconds: 604800
-    }
-  }
-  buildbucket {
-    server: "cr-buildbucket.appspot.com"
-    bucket: "ci"
-    builder: "gotip-linux-arm64-sizespecializedmalloc"
-  }
-}
-job {
   id: "gotip-linux-arm64_c4ah72-perf_vs_release"
   realm: "ci"
   triggering_policy {
@@ -88629,7 +88581,6 @@
   triggers: "gotip-linux-386-clang15"
   triggers: "gotip-linux-386-longtest"
   triggers: "gotip-linux-386-nogreenteagc"
-  triggers: "gotip-linux-386-sizespecializedmalloc"
   triggers: "gotip-linux-386-softfloat"
   triggers: "gotip-linux-386_debiansid"
   triggers: "gotip-linux-amd64"
@@ -88653,7 +88604,6 @@
   triggers: "gotip-linux-amd64-racegocommand-noopt"
   triggers: "gotip-linux-amd64-runtimefreegc"
   triggers: "gotip-linux-amd64-simd"
-  triggers: "gotip-linux-amd64-sizespecializedmalloc"
   triggers: "gotip-linux-amd64-spectre"
   triggers: "gotip-linux-amd64-ssacheck"
   triggers: "gotip-linux-amd64-staticlockranking"
@@ -88673,7 +88623,6 @@
   triggers: "gotip-linux-arm64-nogreenteagc"
   triggers: "gotip-linux-arm64-race"
   triggers: "gotip-linux-arm64-simd"
-  triggers: "gotip-linux-arm64-sizespecializedmalloc"
   triggers: "gotip-linux-arm64_c4ah72-perf_vs_release"
   triggers: "gotip-linux-arm64_c4as16-perf_vs_release"
   triggers: "gotip-linux-arm64_debian13"
diff --git a/generated/project.cfg b/generated/project.cfg
index e682c59..51d2eaf 100644
--- a/generated/project.cfg
+++ b/generated/project.cfg
@@ -7,7 +7,7 @@
 name: "golang"
 access: "group:all"
 lucicfg {
-  version: "1.46.3"
+  version: "1.45.8"
   package_dir: ".."
   config_dir: "generated"
   entry_point: "main.star"
diff --git a/main.star b/main.star
index db520ef..e0c3ec4 100755
--- a/main.star
+++ b/main.star
@@ -447,7 +447,6 @@
     "linux-386_debiansid",
     "linux-386-longtest",
     "linux-386-nogreenteagc",
-    "linux-386-sizespecializedmalloc",
     "linux-386-softfloat",
     "linux-amd64",
     "linux-amd64-asan-clang15",
@@ -471,7 +470,6 @@
     "linux-amd64-racegocommand-noopt",
     "linux-amd64-runtimefreegc",
     "linux-amd64-simd",
-    "linux-amd64-sizespecializedmalloc",
     "linux-amd64-spectre",
     "linux-amd64-ssacheck",
     "linux-amd64-staticlockranking",
@@ -481,13 +479,11 @@
     "linux-amd64_c2s16-perf_pgo_vs_oldest_stable",
     "linux-amd64_c2s16-perf_vs_gopls_0_11",
     "linux-amd64_c2s16-perf_vs_parent",
-    "linux-amd64_c2s16-perf_vs_parent-sizespecializedmalloc",
     "linux-amd64_c2s16-perf_vs_release",
     "linux-amd64_c2s16-perf_vs_tip",
     "linux-amd64_c2s16-perf_vs_oldest_stable",
     "linux-amd64_c3h88-perf_pgo_vs_oldest_stable",
     "linux-amd64_c3h88-perf_vs_parent",
-    "linux-amd64_c3h88-perf_vs_parent-sizespecializedmalloc",
     "linux-amd64_c3h88-perf_vs_release",
     "linux-amd64_c3h88-perf_vs_tip",
     "linux-amd64_c3h88-perf_vs_oldest_stable",
@@ -508,15 +504,12 @@
     "linux-arm64-msan-clang15",
     "linux-arm64-race",
     "linux-arm64-simd",
-    "linux-arm64-sizespecializedmalloc",
     "linux-arm64_c4as16-perf_vs_gopls_0_11",
     "linux-arm64_c4as16-perf_vs_parent",
-    "linux-arm64_c4as16-perf_vs_parent-sizespecializedmalloc",
     "linux-arm64_c4as16-perf_vs_release",
     "linux-arm64_c4as16-perf_vs_tip",
     "linux-arm64_c4as16-perf_vs_oldest_stable",
     "linux-arm64_c4ah72-perf_vs_parent",
-    "linux-arm64_c4ah72-perf_vs_parent-sizespecializedmalloc",
     "linux-arm64_c4ah72-perf_vs_release",
     "linux-arm64_c4ah72-perf_vs_tip",
     "linux-arm64_c4ah72-perf_vs_oldest_stable",
@@ -1244,12 +1237,6 @@
         enabled = define_for_simd(),
     ),
 
-    # Build and test with GOEXPERIMENT=sizespecializedmalloc.
-    "sizespecializedmalloc": make_run_mod(
-        add_env = {"GOEXPERIMENT": "sizespecializedmalloc"},
-        enabled = define_for_gotip_postsubmit_or_presubmit_with_filters(["src/runtime/[^/]+"]),
-    ),
-
     # Build and test with GO386=softfloat, which makes the compiler emit non-floating-point
     # CPU instructions to perform floating point operations.
     "softfloat": make_run_mod(