| Name | Lines of code | Maintainability | Test coverage |
| lib/bson/document.rb | 76 | A 0 mins | |
| lib/bson/decimal128.rb | 85 | A 0 mins | |
| lib/bson/hash.rb | 87 | A 0 mins | |
| lib/bson/regexp.rb | 96 | A 25 mins | |
| lib/bson/object_id.rb | 102 | A 2 hrs | |
| perf/bench.rb | 159 | B 4 hrs | |
| lib/bson/binary.rb | 185 | A 2 hrs | |
| lib/bson/decimal128/builder.rb | 236 | A 2 hrs | |
| lib/bson/ext_json.rb | 247 | F 3 days | |
| src/main/org/bson_ruby/ByteBuf.java | 422 | C 1 day | |
| perf/bench_test.rb | 716 | F 3 days |