modernize: Use b.Loop (introduced in Go 1.24)

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

daemon/internal/filedescriptors/filiedescriptors_linux_test.go

@@ -8,7 +8,7 @@ import (
 func BenchmarkGetTotalUsedFds(b *testing.B) {
 	ctx := context.Background()
 	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		_ = GetTotalUsedFds(ctx)
 	}
 }

daemon/internal/stdcopymux/stdcopy_test.go

@@ -287,8 +287,8 @@ func BenchmarkWrite(b *testing.B) {
 	data := []byte("Test line for testing stdwriter performance\n")
 	data = bytes.Repeat(data, 100)
 	b.SetBytes(int64(len(data)))
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+
+	for b.Loop() {
 		if _, err := w.Write(data); err != nil {
 			b.Fatal(err)
 		}

daemon/internal/stream/bytespipe/bytespipe_test.go

@@ -184,7 +184,7 @@ func TestBytesPipeWriteRandomChunks(t *testing.T) {
 func BenchmarkBytesPipeWrite(b *testing.B) {
 	b.ReportAllocs()
 	testData := []byte("pretty short line, because why not?")
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		readBuf := make([]byte, 1024)
 		buf := New()
 		go func() {
@@ -203,7 +203,7 @@ func BenchmarkBytesPipeWrite(b *testing.B) {
 func BenchmarkBytesPipeRead(b *testing.B) {
 	b.ReportAllocs()
 	rd := make([]byte, 512)
-	for i := 0; i < b.N; i++ {
+	for b.Loop() {
 		b.StopTimer()
 		buf := New()
 		for j := 0; j < 500; j++ {

daemon/internal/stream/unbuffered_test.go

@@ -145,8 +145,8 @@ func BenchmarkUnbuffered(b *testing.B) {
 	buf.WriteString(testLine)
 	testText := buf.Bytes()
 	b.SetBytes(int64(5 * len(testText)))
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
+
+	for b.Loop() {
 		b.StopTimer()
 		setUpWriter()
 		b.StartTimer()