example of using pprof

gistfile1.go

package main

import (
	"runtime/pprof"
	"fmt"
	"net/http"
	"os"
	"time"
)

// might need graphviz: `brew install graphviz`
// make binary:         `go build pprof_example.go`
// run binary:          `./pprof_example`
// open that tool:      `go tool pprof pprof_example my_profile.prof`
// make temp svg file:  `web`
// open svg in your browser
// (when you exit the pprof tool, the svg temp file vanishes)

func main() {
	// make the profile output file
	f, _ := os.Create("my_profile.prof")

	// do some hard work
	fmt.Println("howdy there partner")
	http.Get("http://google.com")

	wasteTime()

	// DON'T use defer
	pprof.WriteHeapProfile(f)
	f.Close()
}

func wasteTime() {
	time.Sleep(100 * time.Millisecond)
}