Profile with pprof

Use runtime/pprof to capture CPU or memory profiles and analyze them with the pprof tool. Start a CPU profile by calling pprof.StartCPUProfile with a file handle, let your program run, then stop it with pprof.StopCPUProfile and analyze the output file.

package main

import (
	"os"
	"runtime/pprof"
)

func main() {
	f, _ := os.Create("cpu.prof")
	pprof.StartCPUProfile(f)
	// Run your workload here
	pprof.StopCPUProfile()
	f.Close()
}

Run go tool pprof cpu.prof to visualize the results.

Profiling with pprof records how your Go program uses CPU or memory while it runs. It helps you find slow functions or memory leaks so you can make your code faster. Think of it like a fitness tracker for your software that shows exactly where it is working hardest.