30 Jun '12, 4pm

Ruby 2.0 is getting DTrace probes, and here is how @tenderlove already used them to improve rails perf.

So where do we start? Typically, we begin at the beginning. Today we'll start profiling the rake environment command. This task simply requires all of the files for your application, readying everything for execution against a Rails context. Many things can impact the startup time of our application: file parse time, method call time, GC, etc. Today we're going to focus on slow methods, and using DTrace to find those methods.

Full article: http://tenderlovemaking.com/2011/12/05/profiling-rails-st...

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