Profiling Go Applications with pprof

Runtime Profilers

This lesson explains the main concept clearly with beginner-friendly examples and background so you can learn why the code works.

The net/http/pprof package exposes profiling data over HTTP.

import _ "net/http/pprof"

func main() {
    go func() { http.ListenAndServe(":6060", nil) }()
    // rest of your app …
}

Visit http://localhost:6060/debug/pprof/ and click heap, goroutine, profile.

Generating a CPU profile manually

$ go test -bench=BenchmarkXYZ -benchmem -cpuprofile=cpu.out
$ go tool pprof cpu.out
(pprof) top

Visualizing with graphviz

$ go tool pprof -http=:8080 cpu.out