1 files changed, 32 insertions, 0 deletions
diff --git a/libgo/go/runtime/string_test.go b/libgo/go/runtime/string_test.go
index 8f13f0f428b..df3ff06a7dd 100644
--- a/libgo/go/runtime/string_test.go
+++ b/libgo/go/runtime/string_test.go
@@ -1,3 +1,7 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package runtime_test
 
 import (
@@ -43,3 +47,31 @@ func BenchmarkCompareStringDifferentLength(b *testing.B) {
 		}
 	}
 }
+
+func BenchmarkCompareStringBigUnaligned(b *testing.B) {
+	bytes := make([]byte, 0, 1<<20)
+	for len(bytes) < 1<<20 {
+		bytes = append(bytes, "Hello Gophers!"...)
+	}
+	s1, s2 := string(bytes), "hello"+string(bytes)
+	for i := 0; i < b.N; i++ {
+		if s1 != s2[len("hello"):] {
+			b.Fatal("s1 != s2")
+		}
+	}
+	b.SetBytes(int64(len(s1)))
+}
+
+func BenchmarkCompareStringBig(b *testing.B) {
+	bytes := make([]byte, 0, 1<<20)
+	for len(bytes) < 1<<20 {
+		bytes = append(bytes, "Hello Gophers!"...)
+	}
+	s1, s2 := string(bytes), string(bytes)
+	for i := 0; i < b.N; i++ {
+		if s1 != s2 {
+			b.Fatal("s1 != s2")
+		}
+	}
+	b.SetBytes(int64(len(s1)))
+}