Why you want it

$ bundle exec rake assets:precompile:profile RAILS_GROUPS=assets
application.js                                              6663ms
new_project.js                                              367ms
vendor.js                                                   966ms
application.css                                             8579ms
styleguide-extras.css                                       271ms
styleguide.css                                              429ms
Compilation finished in 17765ms.

How to use it

# Gemfile
gem 'rails-asset_profile', github: 'nadarei/rails-asset_profile', branch: 'master'

Caveats

This generates identical digest and non-digest assets to do things faster. This, for most cases, is usually fine.

If you're affected by this, just regenerate them properly with Rails's rake assets:precompile :-)

Acknowledgements

Uses code directly taken from sprockets-rails.

License

MIT.