cmd/bench: run go tests 6 times

benchstat wants 95% CI by default, which requires at least 6 samples.

Change-Id: I250255b4d7860892de330e31269184b5e97bc7a6
Reviewed-on: https://go-review.googlesource.com/c/benchmarks/+/623641
Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

cmd/bench/gotest.go

diff --git a/cmd/bench/gotest.go b/cmd/bench/gotest.go
index ac8b46a..de3dab7 100644
--- a/cmd/bench/gotest.go
+++ b/cmd/bench/gotest.go
@@ -14,7 +14,7 @@
 	for _, tc := range tcs {
 		log.Printf("Running Go test benchmarks for %s", tc.Name)
 		fmt.Printf("toolchain: %s\n", tc.Name)
-		err := tc.Do("", "test", "-v", "-run=none", "-short", "-bench=.", "-count=5", "golang.org/x/benchmarks/...")
+		err := tc.Do("", "test", "-v", "-run=none", "-short", "-bench=.", "-count=6", "golang.org/x/benchmarks/...")
 		if err != nil {
 			return fmt.Errorf("error running gotest with toolchain %s: %w", tc.Name, err)
 		}
@@ -68,7 +68,7 @@
 			fmt.Printf("toolchain: %s\n", test.name) // set the toolchain tag
 
 			goplsPath := filepath.Join(test.goplsDir, "gopls")
-			err = tc.Do(benchmarkDir, "test", "-short", "-bench=.", fmt.Sprintf(`-gopls_path=%s`, goplsPath), "-count=5", "-timeout=180m")
+			err = tc.Do(benchmarkDir, "test", "-short", "-bench=.", fmt.Sprintf(`-gopls_path=%s`, goplsPath), "-count=6", "-timeout=180m")
 			if err != nil {
 				return fmt.Errorf("error running sub-repo %s benchmark %q with toolchain %s in dir %s: %w", subRepo, test.name, tc.Name, benchmarkDir, err)
 			}