From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-09-11T05:55:12+09:00
Subject: Re: Looking for advice on how to report performance issues

Profile on Linux and on Windows and look for differences.

Here's something I just googled up, see if it works for you:
http://old.thoughtsincomputation.com/posts/profiling-with-rspec-and-ruby-prof

-- Matma Rex