A quick tip for those who may have not noticed that Ruby 1.9.2 and 1.9.3 are significantly slower than 1.8.7 at loading Rails 3 apps; as a result, Rails 3 apps’ startup takes much longer, affecting - for example - testing, firing up consoles, and so on. So I wrote a short post on how to patch the latest stable version of Ruby (p290) with a version of the ‘fast require’ patch that works with this revision, so to improve startup time with Rails 3/3.1 apps - plus a mention on a couple issues when installing Ruby with this patch and packages such as readline, iconv, at the same time.

Rails 3.1 and installing Ruby 1.9.2-p290 with the ‘fast require’ patch, readline, iconv