go pprof snippet

cpu, trace, memory, block and goroutine

cw, err := os.Getwd()
	if err != nil {
		panic(err)
	}

	f, err := os.Create(path.Join(cw, "cpu.prof"))
	if err != nil {
		panic(err)
	}
	defer f.Close()
	if err := pprof.StartCPUProfile(f); err != nil {
		log.Fatal("could not start CPU profile: ", err)
	}
	defer pprof.StopCPUProfile()

	tf, err := os.Create(path.Join(cw, "trace.out"))
	if err != nil {
		panic(err)
	}
	defer tf.Close()
	if err := trace.Start(tf); err != nil {
		log.Fatalf("profile: could not start trace: %v", err)
	}
	defer trace.Stop()

	old := runtime.MemProfileRate
	runtime.MemProfileRate = 4096
	defer func() {
		cw, err := os.Getwd()
		if err != nil {
			panic(err)
		}
		f, err := os.Create(path.Join(cw, "mem.prof"))
		if err != nil {
			panic(err)
		}
		defer f.Close()

		defer func() {
			runtime.MemProfileRate = old
		}()

		runtime.GC()
		if err := pprof.WriteHeapProfile(f); err != nil {
			log.Fatal("could not write memory profile: ", err)
		}
	}()

	runtime.SetBlockProfileRate(1)
	defer func() {

		cw, err := os.Getwd()
		if err != nil {
			panic(err)
		}
		f, err := os.Create(path.Join(cw, "block.prof"))
		if err != nil {
			panic(err)
		}
		defer f.Close()

		runtime.SetBlockProfileRate(1)
		defer func() {
			pprof.Lookup("block").WriteTo(f, 0)
			runtime.SetBlockProfileRate(0)
		}()

	}()

	defer func() {

		cw, err := os.Getwd()
		if err != nil {
			panic(err)
		}
		f, err := os.Create(path.Join(cw, "goroutine.prof"))
		if err != nil {
			panic(err)
		}
		defer f.Close()

		runtime.SetBlockProfileRate(1)
		defer func() {
			if mp := pprof.Lookup("goroutine"); mp != nil {
				mp.WriteTo(f, 0)
			}
		}()

	}()