Rack::Stackprof

Periodically dump StackProf profile result to tmp with easy-to-understand filenames

Add this line to your application's Gemfile:

gem 'rack-stackprof'

And then execute:

$ bundle

if ENV['STACKPROF_ENABLE'] == 'true'
  Rails.application.middleware.use(
    Rack::Stackprof,
    profile_interval_seconds: 1,
    sampling_interval_microseconds: 1000,
    result_directory: 'tmp',
  )
end

After starting application with environment variable STACKPROF_ENABLE=true, files whose name is like following ones will be periodically (once per second as profile_interval_seconds: 1) dumped to tmp.

stackprof-20171004_175816-41860-GET_v1_users-0308ms.dump
stackprof-20171004_175924-41860-GET_v1_accounts-0248ms.dump
stackprof-20171004_175955-41860-GET_v1_comments-1029ms.dump
...

The gem is available as open source under the terms of the MIT License.