| Name | Lines of code | Maintainability | Test coverage |
| lib/celluloid/system_events.rb | 93 | A 0 mins | |
| lib/celluloid/supervision/configuration/instance.rb | 95 | B 4 hrs | |
| lib/celluloid/group/pool.rb | 96 | A 0 mins | |
| lib/celluloid/logging/incident_logger.rb | 105 | A 45 mins | |
| lib/celluloid/future.rb | 109 | A 3 hrs | |
| lib/celluloid/supervision/container.rb | 112 | A 0 mins | |
| lib/celluloid/actor/system.rb | 119 | B 6 hrs | |
| lib/celluloid/mailbox.rb | 123 | A 0 mins | |
| lib/celluloid/task.rb | 130 | A 3 hrs | |
| lib/celluloid/supervision/configuration.rb | 143 | A 3 hrs | |
| lib/celluloid/supervision/container/pool.rb | 161 | B 4 hrs | |
| lib/celluloid/actor.rb | 250 | C 1 day | |
| lib/celluloid.rb | 376 | C 7 hrs |