Using the EncodeToString function from the encoding/hex package
is much faster than calling the fmt.Sprintf with %x
Benchmark results below with the following code
func BenchmarkHexPrint(b *testing.B) {
data := []byte("hellothere")
for n := 0; n < b.N; n++ {
// _ = fmt.Sprintf("%x", data)
_ = hex.EncodeToString(data)
}
}
name old time/op new time/op delta
HexPrint-4 188ns ± 1% 99ns ± 1% -47.40% (p=0.008 n=5+5)
name old alloc/op new alloc/op delta
HexPrint-4 64.0B ± 0% 64.0B ± 0% ~ (all equal)
name old allocs/op new allocs/op delta
HexPrint-4 2.00 ± 0% 2.00 ± 0% ~ (all equal)
