Go fmt Benchmark

The Go standard library has a lot of different functions to format strings. This benchmark compares the performance of some of them. This benchmark can be used to find the fastest function for a specific use-case.

println

printf

print

println

printf

print

Full Benchmark Code

const s = "Hello, World!"

func BenchmarkFmt_println(b *testing.B) {
	os.Stdout, _ = os.Open(os.DevNull)

	for i := 0; i < b.N; i++ {
		fmt.Println(s)
	}
}

func BenchmarkFmt_print(b *testing.B) {
	os.Stdout, _ = os.Open(os.DevNull)

	for i := 0; i < b.N; i++ {
		fmt.Print(s)
	}
}

func BenchmarkFmt_printf(b *testing.B) {
	os.Stdout, _ = os.Open(os.DevNull)

	for i := 0; i < b.N; i++ {
		fmt.Printf("%s\n", s)
	}
}

Full Benchmark Output