[sroerick]

I've never used flamegraphs but would like to know about them. Can you explain more? Or where should I start?

[atdt]

Flame graphs have an official web site, maintained by Brendan Gregg, who invented them: https://www.brendangregg.com/flamegraphs.html. It's a useful starting point.

[dummydummy1234]

I would also try hotspot, it is a interactive viewer for perf graphs.

[jsymolon]

I use them all the time on Perl code.

https://metacpan.org/pod/Devel::NYTProf