Bootscale

Speedup applications boot by caching require calls.

Speed gain depends on your number of gems. Under 100 gems you likely won't see the difference, but for bigger applications it can save 1 to 2 seconds of boot time per 100 gems in the Gemfile.

Installation

# Gemfile
gem 'bootscale', require: false

Then you need to add right after require 'bundler/setup':

require 'bundler/setup'
require 'bootscale/setup'

If your application is a Rails application, you will find this in config/boot.rb.

Important

Cache should be update everytime $LOAD_PATH is modified by calling Bootscale.regenerate.

For Rails apps it means adding an initializer in config/application.rb:

module MyApp
  class Application < Rails::Application
    initializer :regenerate_require_cache, after: :set_load_path do
      Bootscale.regenerate
    end
  end
end

Faster cache loading

Add the msgpack gem and require 'msgpack' to gain ~10-30ms of extra load speed by using msgpack.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/byroot/bootscale.

Local development: your load time will be very slow when using a local copy for development like gem 'bootscale', path: '~/Code/bootscal', use via git instead.

Thanks to Aaron Patterson for the idea of converting relative paths to absolute paths.