Profile Go services in production with pprof in 10 minutes

Short summary

Go includes a production profiler (pprof) accessible over HTTP without external tools or instrumentation. A single import enables endpoints for CPU, memory, goroutine, and mutex profiles; flame graphs reveal where your program spends time and expose bottlenecks. The guide covers three common worker-pool patterns: excess allocations (fixed with sync.Pool), goroutine leaks (unclosed channels), and mutex contention (profiled under load).

• •pprof is Go's built-in profiler; enable with one import and access via HTTP endpoints
• •Use flame graphs to visualize CPU time; wider bars indicate functions consuming more CPU
• •Three common patterns: allocation hotspots (sync.Pool reuse), goroutine leaks (defer close), mutex contention (test under load)

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