| Name | Lines of code | Maintainability | Test coverage |
| lib/mongo/crypt/handle.rb | 239 | C 1 day | |
| lib/mongo/collection.rb | 239 | C 7 hrs | |
| lib/mongo/socket/ocsp_verifier.rb | 241 | D 1 day | |
| lib/mongo/cursor.rb | 251 | C 1 day | |
| lib/mongo/collection/view/readable.rb | 269 | D 2 days | |
| lib/mongo/retryable.rb | 291 | D 2 days | |
| lib/mongo/server/description.rb | 291 | D 2 days | |
| lib/mongo/collection/view/writable.rb | 301 | F 4 days | |
| lib/mongo/uri.rb | 311 | D 2 days | |
| lib/mongo/server.rb | 316 | C 1 day | |
| lib/mongo/server_selector/base.rb | 334 | F 3 days | |
| lib/mongo/cluster/sdam_flow.rb | 424 | F 3 days | |
| lib/mongo/uri/options_mapper.rb | 428 | F 3 days | |
| lib/mongo/cluster.rb | 466 | F 4 days | |
| lib/mongo/session.rb | 545 | F 5 days | |
| lib/mongo/crypt/binding.rb | 607 | D 2 days | |
| lib/mongo/client.rb | 697 | F 1 wk | |
| lib/mongo/server/connection_pool.rb | 712 | F 6 days | |
| lib/mongo/auth/stringprep/unicode_normalize/tables.rb | 1,161 | D 2 days | |
| lib/mongo/auth/stringprep/tables.rb | 3,148 | F 1 wk |