slice_test.go

func BenchmarkFormat(b *testing.B) {

	b.Run("appendFormat", func(b *testing.B) {
		b.ReportAllocs()
		var specIdStr []byte
		var l int = 10
		for i := 0; i < b.N; i++ {
			val1 := rand.Int63()
			val2 := rand.Int63()
			val3 := rand.Int63()
			var length int = 6*l
			specIdStr = make([]byte, 0, length)
			specIdStr = strconv.AppendInt(specIdStr, val1, 10)
			specIdStr = append(specIdStr, '_')
			specIdStr = strconv.AppendInt(specIdStr, val2, 10)
			specIdStr = append(specIdStr, '_')
			specIdStr = strconv.AppendInt(specIdStr, val3, 10)
			if len(specIdStr)>60{
				b.Error("larger than 60")
			}
		}

		b.Log(string(specIdStr))
	})
	b.Run("format", func(b *testing.B) {
		b.ReportAllocs()
		var specIdStr string
		for i := 0; i < b.N; i++ {
			val1 := rand.Int63()
			val2 := rand.Int63()
			val3 := rand.Int63()

			specIdStr = strconv.FormatInt(val1, 10)
			specIdStr += "_" + strconv.FormatInt(val2, 10)
			specIdStr += "_" + strconv.FormatInt(val3, 10)
		}
		b.Log(specIdStr)
	})
}