@fglc2 Quick thanks for your lightning talk ⚡ on ruby-prof at Brighton Ruby 2019! (https://brightonruby.com/2019/fixing-performance-problems-with-ruby-prof-frederick-cheung/) It's the first thing I found that explained the basics beyond "this is how you run it, good luck" 😛
@pablobm no problem! I did a longer version at rubyconf that year (mostly longer because I talked about memory leaks but I think I had time for some extra profiler bits too)