diff --git a/src/crypto/cipher/benchmark_test.go b/src/crypto/cipher/benchmark_test.go
index 93c40d0f46..83fede242f 100644
--- a/src/crypto/cipher/benchmark_test.go
+++ b/src/crypto/cipher/benchmark_test.go
@@ -26,6 +26,22 @@ func benchmarkAESGCMSeal(b *testing.B, buf []byte) {
 	}
 }
 
+func benchmarkAESGCMSign(b *testing.B, buf []byte) {
+	b.SetBytes(int64(len(buf)))
+
+	var key [16]byte
+	var nonce [12]byte
+	aes, _ := aes.NewCipher(key[:])
+	aesgcm, _ := cipher.NewGCM(aes)
+	var out []byte
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		out = append(out[:0], buf...)
+		out = aesgcm.Seal(out, nonce[:], nil, buf)
+	}
+}
+
 func benchmarkAESGCMOpen(b *testing.B, buf []byte) {
 	b.SetBytes(int64(len(buf)))
 
@@ -58,6 +74,10 @@ func BenchmarkAESGCMSeal8K(b *testing.B) {
 	benchmarkAESGCMSeal(b, make([]byte, 8*1024))
 }
 
+func BenchmarkAESGCMSign8K(b *testing.B) {
+	benchmarkAESGCMSign(b, make([]byte, 8*1024))
+}
+
 func BenchmarkAESGCMOpen8K(b *testing.B) {
 	benchmarkAESGCMOpen(b, make([]byte, 8*1024))
 }