package main

import (
	"log"
	"os"
	"runtime/pprof"
)

func calc() {
	var a []uint64
	for i := 0; i < 100000; i++ {
		a = append(a, uint64(i))
	}
}

func main() {
	f, err := os.Create("lala.prof")
	if err != nil {
		log.Fatal(err)
	}
	pprof.StartCPUProfile(f)
	defer pprof.StopCPUProfile()

	for i := 0; i < 10000; i++ {
		calc()
	}
}