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Go Profiling with pprof: A Practical Guide

23. 06. 2024 1 min read intermediate

Go má skvělé zabudované profiling nástroje. Jak je použít.

Aktivace pprof

import _ “net/http/pprof”
go func() { log.Println(http.ListenAndServe(“:6060”, nil)) }()

CPU profiling

go tool pprof http://localhost:6060/debug/pprof/profile?seconds=30

Memory

go tool pprof http://localhost:6060/debug/pprof/heap

Goroutines

curl http://localhost:6060/debug/pprof/goroutine?debug=1

Flame graphs

go tool pprof -http=:8080 cpu.prof

Benchmarky

func BenchmarkMyFunc(b *testing.B) { for i := 0; i < b.N; i++ { MyFunc() } }
go test -bench=. -benchmem

Optimalizace

  • sync.Pool pro opakované alokace
  • Prealokace slices
  • strings.Builder
  • Buffered channels

Summary

pprof je zabudovaný a výkonný. CPU + heap stačí na 90 % problémů.

goperformanceprofiling
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CORE SYSTEMS tým

Stavíme core systémy a AI agenty, které drží provoz. 15 let zkušeností s enterprise IT.