RSpec Profile

RSpec includes an easy way to measure test speed, the -p (profile) flag. It takes an argument [COUNT] representing the number of blocks to measure, defaulting to 10.

Here's some sample output:

Top 3 slowest examples (0.03332 seconds, 57.9% of total time):
  Developer should have a valid factory
    0.0199 seconds ./spec/models/developer_spec.rb:4
  Post should have a valid factory
    0.00816 seconds ./spec/models/post_spec.rb:4
  Post should require a body
    0.00525 seconds ./spec/models/post_spec.rb:16

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