| Name | Lines of code | Maintainability | Test coverage |
| lib/em/pure_ruby.rb | 863 | F 3 days | |
| lib/em/queue.rb | 44 | A 35 mins | |
| lib/em/resolver.rb | 187 | A 2 hrs | |
| lib/em/spawnable.rb | 42 | A 25 mins | |
| lib/em/streamer.rb | 66 | A 3 hrs | |
| lib/em/threaded_resource.rb | 29 | A 0 mins | |
| lib/em/tick_loop.rb | 45 | A 35 mins | |
| lib/em/timers.rb | 32 | A 0 mins | |
| lib/em/version.rb | 3 | A 0 mins | |
| lib/eventmachine.rb | 527 | F 4 days | |
| lib/jeventmachine.rb | 226 | A 35 mins | |
| rakelib/package.rake | |||
| rakelib/test.rake | |||
| rakelib/test_pure.rake | |||
| win_gem_test/Rakefile_wintest | |||
| win_gem_test/eventmachine.ps1 | |||
| win_gem_test/package_gem.rb | 13 | A 0 mins |