Profiling Go's RSA key generation

rsa.go

package main

import (
	"crypto/rand"
	"crypto/rsa"
	"os"
	"runtime/pprof"
)

func main() {
	f, err := os.Create("rsa_cpu_profile")
	if err != nil {
		panic(err)
	}

	pprof.StartCPUProfile(f)
	defer pprof.StopCPUProfile()

	_, err = rsa.GenerateKey(rand.Reader, 4096)
	if err != nil {
		panic(err)
	}
}