Скорость копирования памяти

process-vectors-copy.go

package main

import (
	"fmt"
	"math"
	"time"
)

type V4 [4]float32

const (
	numVectors = 8 * 1024 * 1024
)

func benchmark(f func()) {
	best := math.MaxFloat64
	for i := 0; i < 100; i++ {
		start := time.Now()
		f()
		end := time.Now()
		elapsed := end.Sub(start).Seconds()
		if elapsed < best {
			best = elapsed
		}
	}
	fmt.Printf("%.0fms\n", best*1000)
}

func main() {
	data := make([]V4, numVectors)

	for i := range data {
		data[i] = V4{1, 2, 3, 4}
	}

	benchmark(func() { copy(data, data) })
}

run.sh

go build -o process-vectors-copy && ./process-vectors-copy