How was the flame graph created? (Not very familiar with C and the performance t...

landr0id · 2025-06-06T18:34:11 1749234851

You can also use https://github.com/mstange/samply to make recording and viewing in the Firefox profiler easier.

It will spin up a localhost server after the trace ends, the profiler uses the localhost server and nothing is shared with Firefox servers unless you explicitly choose to upload the data and create a permalink.

plorkyeran · 2025-06-06T16:43:00 1749228180

https://github.com/brendangregg/FlameGraph

You record performance data with `perf`, then use the scripts there to turn it into a SVG.

IshKebab · 2025-06-06T19:31:55 1749238315

I strongly recommend not using this. Instead use pprof - it has a MUCH better interactive flamegraph, plus other nice performance visualisations (e.g. a call graph):

https://github.com/google/pprof

    go install github.com/google/pprof@latest
    pprof -http=: prof.out

I normally collect the profiles with gperftools (https://github.com/gperftools/gperftools) and then just

    LD_PRELOAD=/usr/lib/libtcmalloc_and_profiler.so CPUPROFILE=prof.out <your command>

I've been meaning to try Samply though. Not sure if it works with pprof.

nayak · 2025-06-06T17:24:25 1749230665

OP here. In this particular case, I used https://github.com/flamegraph-rs/flamegraph