1 files changed, 54 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/test/bench_test.go b/src/cmd/compile/internal/test/bench_test.go
index 694673a8f6..1d74d39a49 100644
--- a/src/cmd/compile/internal/test/bench_test.go
+++ b/src/cmd/compile/internal/test/bench_test.go
@@ -4,7 +4,10 @@
 
 package test
 
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 var globl int64
 var globl32 int32
@@ -174,3 +177,53 @@ func BenchmarkSimplifyNegDiv(b *testing.B) {
 		globl = s
 	}
 }
+
+var globbool bool
+
+// containsRight compares strs[i] == str (slice element on left).
+//
+//go:noinline
+func containsRight(strs []string, str string) bool {
+	for i := range strs {
+		if strs[i] == str {
+			return true
+		}
+	}
+	return false
+}
+
+// containsLeft compares str == strs[i] (parameter on left).
+//
+//go:noinline
+func containsLeft(strs []string, str string) bool {
+	for i := range strs {
+		if str == strs[i] {
+			return true
+		}
+	}
+	return false
+}
+
+// BenchmarkStringEqParamOrder tests that the operand order of string
+// equality comparisons does not affect performance. See issue #74471.
+func BenchmarkStringEqParamOrder(b *testing.B) {
+	strs := []string{
+		"12312312", "abcsdsfw", "abcdefgh", "qereqwre",
+		"gwertdsg", "hellowod", "iamgroot", "theiswer",
+		"dg323sdf", "gadsewwe", "g42dg4t3", "4hre2323",
+		"23eg4325", "13234234", "32dfgsdg", "23fgre34",
+		"43rerrer", "hh2s2443", "hhwesded", "1swdf23d",
+		"gwcdrwer", "bfgwertd", "badgwe3g", "lhoejyop",
+	}
+	target := fmt.Sprintf("%s", "notfound")
+	b.Run("ParamRight", func(b *testing.B) {
+		for b.Loop() {
+			globbool = containsRight(strs, target)
+		}
+	})
+	b.Run("ParamLeft", func(b *testing.B) {
+		for b.Loop() {
+			globbool = containsLeft(strs, target)
+		}
+	})
+}