What's ruby-prof profiler for ruby. would you see http://ruby-prof.rubyforge.org/ Install would you see http://ruby-prof.rubyforge.org/. I installed version 0.10.7. % sudo gem install ruby-prof Usage There are three ways of running ruby-prof. http://ruby-prof.rubyforge.org/ The first : ruby-prof executable for example. % ruby-prof --printer=flat --file=result --mode=wall hoge.rb hoge.rb for i in 1