Profiler Comparison

Here is an overview of the profilers built into the Go runtime.

	CPU	Memory	Block	Mutex	Goroutine
Production Safety	✅	✅	⚠️ 1	✅	✅ 2
Safe Rate	default	default	❌ 1	100	1000 goroutines
Max Stack Depth	64	32	32	32	32 - 100 3
Profiler Labels	✅	❌	❌	❌	✅ 3

The ThreadCreate Profiler is not listed because it’s broken.

1(1,2)

The block profiler can cause 5% or more CPU overhead, even when using a high rate value.

2

Before Go 1.19, this profile caused O(N) stop-the-world pauses where N is the number of goroutines. Expect ~1-10µsec pause per goroutine.

3(1,2)

Depends on API.