From 1badc5b842716d3e2a736dca05ad61de02cced7c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Felix=20Geisend=C3=B6rfer?= Date: Wed, 19 Jan 2022 09:20:25 +0100 Subject: [PATCH] README: More prominent STW warning Can't expect people to read the "How it Works" section. --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 1c1b205..ee61a84 100644 --- a/README.md +++ b/README.md @@ -10,6 +10,8 @@ Go's builtin sampling CPU profiler can only show On-CPU time, but it's better th fgprof is designed for analyzing applications with mixed I/O and CPU workloads. This kind of profiling is also known as wall-clock profiling. +⚠️ fgprof can cause significant STW latencies in applications with a lot of goroutines (> 1-10k). Be careful with it in production. + ## Quick Start If this is the first time you hear about fgprof, you should start by reading about [The Problem](#the-problem) & [How it Works](#how-it-works).