Five Ruby Methods You Should Be Using
Post on the Engine Yard blog about under used Ruby methods. I can’t say that I have used any of these methods on a regular basis but probably should be using them more.
Code Quality Metrics That Matter
A walkthrough of ruby code tools, brakeman, simplecov, rack-mini-profiler, and RuboCop.
Two different items on profiling in Ruby.
Ruby, Trace, Leave, Oh my! covering the Ruby 2 TracePoint API
RBKit a Ruby profiler with a GUI for OSX or Linux. Looks similar to VisualVM in Java.