diff --git a/sweet/benchmarks/etcd/main.go b/sweet/benchmarks/etcd/main.go
index e82e176..b132185 100644
--- a/sweet/benchmarks/etcd/main.go
+++ b/sweet/benchmarks/etcd/main.go
@@ -176,6 +176,8 @@
 	name       string
 	reportName string
 	args       []string
+	longArgs   []string // if !config.short
+	shortArgs  []string // if config.short
 }
 
 var benchmarks = []benchmark{
@@ -190,9 +192,14 @@
 			"put",
 			"--key-size=8",
 			"--sequential-keys",
-			"--total=100000",
 			"--val-size=256",
 		},
+		longArgs: []string{
+			"--total=100000",
+		},
+		shortArgs: []string{
+			"--total=1000",
+		},
 	},
 	{
 		name:       "stm",
@@ -204,9 +211,14 @@
 			"stm",
 			"--keys=1000",
 			"--keys-per-txn=2",
-			"--total=100000",
 			"--val-size=8",
 		},
+		longArgs: []string{
+			"--total=100000",
+		},
+		shortArgs: []string{
+			"--total=1000",
+		},
 	},
 }
 
@@ -216,6 +228,11 @@
 		hosts = append(hosts, inst.host(clientPort))
 	}
 	args := append([]string{"--endpoints", strings.Join(hosts, ",")}, cfg.bench.args...)
+	if cfg.short {
+		args = append(args, cfg.bench.shortArgs...)
+	} else {
+		args = append(args, cfg.bench.longArgs...)
+	}
 	cmd := exec.Command(cfg.benchmarkBin, args...)
 
 	var stdout, stderr bytes.Buffer
diff --git a/sweet/benchmarks/gopher-lua/main.go b/sweet/benchmarks/gopher-lua/main.go
index 88c50c7..5e3d735 100644
--- a/sweet/benchmarks/gopher-lua/main.go
+++ b/sweet/benchmarks/gopher-lua/main.go
@@ -64,12 +64,12 @@
 	if err := s.CallByParam(freq, input, lua.LNumber(1)); err != nil {
 		return err
 	}
-	if err := s.CallByParam(freq, input, lua.LNumber(2)); err != nil {
-		return err
-	}
 	if short {
 		return nil
 	}
+	if err := s.CallByParam(freq, input, lua.LNumber(2)); err != nil {
+		return err
+	}
 	if err := s.CallByParam(count, input, lua.LString("GGT")); err != nil {
 		return err
 	}
diff --git a/sweet/benchmarks/tile38/main.go b/sweet/benchmarks/tile38/main.go
index e755fdb..f65870c 100644
--- a/sweet/benchmarks/tile38/main.go
+++ b/sweet/benchmarks/tile38/main.go
@@ -331,7 +331,7 @@
 	}
 	iters := 40 * 50000
 	if cfg.short {
-		iters = 1000
+		iters = 100
 	}
 	return driver.RunBenchmark(benchName, func(d *driver.B) error {
 		if driver.DiagnosticEnabled(diagnostics.Trace) {
diff --git a/sweet/cmd/sweet/integration_test.go b/sweet/cmd/sweet/integration_test.go
index d13ed70..a3fb992 100644
--- a/sweet/cmd/sweet/integration_test.go
+++ b/sweet/cmd/sweet/integration_test.go
@@ -14,6 +14,7 @@
 	"strings"
 	"sync"
 	"testing"
+	"time"
 
 	"golang.org/x/benchmarks/sweet/common"
 	"golang.org/x/sync/semaphore"
@@ -26,6 +27,16 @@
 	if testing.Short() {
 		t.Skip("the full Sweet end-to-end experience takes several minutes")
 	}
+
+	// Timing state for timeout debug logging.
+	testStartTime := time.Now()
+	lastTime := testStartTime
+	phaseDone := func(name string) {
+		now := time.Now()
+		t.Logf("phase %s @%s (duration: %s)", name, lastTime.Sub(testStartTime), now.Sub(lastTime))
+		lastTime = now
+	}
+
 	goRoot := os.Getenv("GOROOT")
 	if goRoot == "" {
 		data, err := exec.Command("go", "env", "GOROOT").Output()
@@ -87,6 +98,8 @@
 		}
 	}()
 
+	phaseDone("setup")
+
 	// Download assets.
 	getCmd := exec.Command(sweetBin, "get",
 		"-auth", "none",
@@ -98,6 +111,8 @@
 		t.Fatal(err)
 	}
 
+	phaseDone("sweet-get")
+
 	// TODO(mknyszek): Test regenerating assets. As it stands, the following
 	// parts of the test will fail if the source assets change, since they're
 	// prebuilt and baked into the assets archive. The only recourse is to
@@ -110,6 +125,12 @@
 
 	var outputMu sync.Mutex
 	runShard := func(shard, resultsDir, workDir string) {
+		startTime := time.Now()
+		defer func() {
+			endTime := time.Now()
+			t.Logf("\tphase sweet-run-%s @%s (duration: %s)", shard, startTime.Sub(testStartTime), endTime.Sub(startTime))
+		}()
+
 		args := []string{
 			"run",
 			"-run", shard,
@@ -163,16 +184,26 @@
 			t.Error(runErr)
 		}
 	}
+	type shard struct {
+		run    string
+		weight int64
+	}
 	// Limit parallelism to conserve memory.
-	sema := semaphore.NewWeighted(2)
+	sema := semaphore.NewWeighted(8)
 	var wg sync.WaitGroup
-	for i, shard := range []string{
-		"tile38", "go-build", "biogo-igor", "biogo-krishna", "etcd",
+	for i, shard := range []shard{
+		{"tile38", 4},
+		{"go-build", 4},
+		{"biogo-igor", 1},
+		{"biogo-krishna", 1},
+		{"etcd", 1},
+		{"bleve-index", 1},
+		{"gopher-lua", 1},
+		{"markdown", 1},
 		// TODO(go.dev/issue/51445): Enable once gVisor builds with Go 1.19.
-		// "gvisor",
-		"bleve-index,gopher-lua,markdown",
+		// {"gvisor", 1},
 	} {
-		sema.Acquire(context.Background(), 1)
+		sema.Acquire(context.Background(), shard.weight)
 		wg.Add(1)
 		go func(i int, shard string) {
 			defer sema.Release(1)
@@ -180,9 +211,11 @@
 			resultsDir := filepath.Join(tmpDir, fmt.Sprintf("results-%d", i))
 			workDir := filepath.Join(tmpDir, fmt.Sprintf("tmp-%d", i))
 			runShard(shard, resultsDir, workDir)
-		}(i, shard)
+		}(i, shard.run)
 	}
 	wg.Wait()
+
+	phaseDone("sweet-run")
 }
 
 func makeConfigFile(t *testing.T, goRoot string) string {
diff --git a/sweet/harnesses/local.go b/sweet/harnesses/local.go
index d3a0022..af1d71c 100644
--- a/sweet/harnesses/local.go
+++ b/sweet/harnesses/local.go
@@ -79,14 +79,19 @@
 	return &localBenchHarness{
 		binName: "bleve-index-bench",
 		genArgs: func(cfg *common.Config, rcfg *common.RunConfig) []string {
-			args := []string{
-				"-batch-size", "100",
-				filepath.Join(rcfg.AssetsDir, "enwiki-20080103-pages-articles.xml.bz2"),
-			}
+			var args []string
 			if rcfg.Short {
-				args = append([]string{"-documents", "100"}, args...)
+				args = []string{
+					"-documents", "10",
+					"-batch-size", "10",
+				}
+			} else {
+				args = []string{
+					"-documents", "1000",
+					"-batch-size", "100",
+				}
 			}
-			return args
+			return append(args, filepath.Join(rcfg.AssetsDir, "enwiki-20080103-pages-articles.xml.bz2"))
 		},
 	}
 }