повезло повезло

povezlo_povezlo.txt

cpu: Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
BenchmarkEncode
BenchmarkEncode/Original
BenchmarkEncode/Original-12         	198959738	         6.091 ns/op	       0 B/op	       0 allocs/op
BenchmarkEncode/Inline
BenchmarkEncode/Inline-12           	252104388	         4.651 ns/op	       0 B/op	       0 allocs/op
BenchmarkEncode/Expand
BenchmarkEncode/Expand-12           	137883550	         8.575 ns/op	       0 B/op	       0 allocs/op
BenchmarkEncode/Optimized
BenchmarkEncode/Optimized-12        	320572156	         3.725 ns/op	       0 B/op	       0 allocs/op
PASS

povezlo_test.go

package blyat

import (
	"encoding/binary"
	"testing"

	"github.com/gotd/td/bin"
)

func BenchmarkEncode(b *testing.B) {
	var (
		TypeID     uint32 = 1
		ID         int    = 10
		AccessHash int64  = 10
	)

	b.Run("Original", func(b *testing.B) {
		buf := bin.Buffer{}
		b.ReportAllocs()

		for i := 0; i < b.N; i++ {
			buf.Reset()

			buf.PutID(TypeID)
			buf.PutInt(ID)
			buf.PutLong(AccessHash)
		}
	})
	b.Run("Inline", func(b *testing.B) {
		buf := bin.Buffer{}
		b.ReportAllocs()

		for i := 0; i < b.N; i++ {
			buf.Reset()

			{
				t := make([]byte, bin.Word)
				binary.LittleEndian.PutUint32(t, TypeID)
				buf.Buf = append(buf.Buf, t...)
			}
			{
				t := make([]byte, bin.Word)
				binary.LittleEndian.PutUint32(t, uint32(ID))
				buf.Buf = append(buf.Buf, t...)
			}
			{
				t := make([]byte, 2*bin.Word)
				binary.LittleEndian.PutUint64(t, uint64(AccessHash))
				buf.Buf = append(buf.Buf, t...)
			}
		}
	})
	b.Run("Expand", func(b *testing.B) {
		buf := bin.Buffer{}
		b.ReportAllocs()

		for i := 0; i < b.N; i++ {
			buf.Reset()

			buf.Expand(4)
			binary.LittleEndian.PutUint32(buf.Buf[0:4:4], TypeID)
			buf.Expand(4)
			binary.LittleEndian.PutUint32(buf.Buf[4:8:8], uint32(ID))
			buf.Expand(8)
			binary.LittleEndian.PutUint64(buf.Buf[8:16:16], uint64(AccessHash))
		}
	})
	b.Run("Optimized", func(b *testing.B) {
		buf := bin.Buffer{}
		b.ReportAllocs()

		for i := 0; i < b.N; i++ {
			buf.Reset()

			buf.Expand(4 + 4 + 8)
			binary.LittleEndian.PutUint32(buf.Buf[0:4:4], TypeID)
			binary.LittleEndian.PutUint32(buf.Buf[4:8:8], uint32(ID))
			binary.LittleEndian.PutUint64(buf.Buf[8:16:16], uint64(AccessHash))
		}
	})
}