refactor: use b.Loop() to simplify the code and improve performance (#25368)

Signed-off-by: withtimezone <with_timezone@outlook.com>

codec/bench_test.go

@@ -33,8 +33,7 @@ func BenchmarkLegacyGetSigners(b *testing.B) {
 		Amount:      nil,
 	}}
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_ = msg.GetSigners()
 	}
 }
@@ -50,8 +49,7 @@ func BenchmarkProtoreflectGetSigners(b *testing.B) {
 		Amount:      nil,
 	}
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, err := signingCtx.GetSigners(msg)
 		if err != nil {
 			panic(err)
@@ -72,8 +70,7 @@ func BenchmarkProtoreflectGetSignersWithUnmarshal(b *testing.B) {
 	a, err := codectypes.NewAnyWithValue(msg)
 	require.NoError(b, err)
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, _, err := cdc.GetMsgAnySigners(a)
 		if err != nil {
 			panic(err)
@@ -97,8 +94,7 @@ func BenchmarkProtoreflectGetSignersDynamicpb(b *testing.B) {
 	err = protov2.Unmarshal(bz, dynamicmsg)
 	require.NoError(b, err)
 
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_, err := signingCtx.GetSigners(dynamicmsg)
 		if err != nil {
 			panic(err)

codec/proto_codec_test.go

@@ -165,10 +165,9 @@ func BenchmarkProtoCodecMarshalLengthPrefixed(b *testing.B) {
 		}),
 	}
 
-	b.ResetTimer()
 	b.ReportAllocs()
 
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		blob, err := pCdc.MarshalLengthPrefixed(msg)
 		if err != nil {
 			b.Fatal(err)