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ClassProfiler

Simple performance analyzer for Ruby classes. Just include it in the bottom of your class and let it analyze your Ruby class performance. Motivation and detailed explanation can be found in this blog post.

Installation

Add this line to your application's Gemfile:

gem 'class_profiler'

And then execute:

$ bundle

Or install it yourself as:

$ gem install class_profiler

Usage

It can be used only for classes. You need to include it in the bottom of your class:

class Foobar
  #includes/extend definitions

  #methods
  def hard_working_method
  end
  #more methods

  include ClassProfiler #include it just before closing the class
end

Or if you want something more configurable, to measure only specific methods and/or modules you can use this little API:

include ClassProfiler.for(instance_methods: [
  :on_correct_scale, :on_correct_currency, :as_financial_value
], modules: [Financial, Company])

It comes with a built-in rack middleware to report you the whole request-response cycle (but you still have to include ClassProfiler in the classes of your interest)

config.middleware.use ClassProfiler::Rack

If you want something more specific, then you only need to wrap the code of your interest under start block:

ClassProfiler::Benchmark.instance.start 'MY LABEL' do
  #code I want to benchmark
end

Note that ClassProfiler::Benchmark class is a singleton.

How does it work?

You can find details on the motivation and implementation in this blog post.

Development

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/vasilakisfil/class_profiler. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

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

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Simple performance profiler with some strong metaprogramming alcohol

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