Places in code with 6 or more lines that are exactly the same.
Intro
- For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
- Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
- You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
- To learn more about duplications and techniques for eliminating duplication, Sokrates recommends the following resources:
- Avoid Repetition, MartinFlower.com (IEEE Software article)
- Refactoring duplicated code, sourcemaking.com
- Beck Design Rules, MartinFowler.com
- DRY (Don't Repeat Yourself) Principle, Wikipedia
- The Cut-and-Paste Programming Software Development Anti-Pattern, sourcemaking.com
- Code Smells / Duplicated Code, Jeff Atwood, codinghorror.com:
- "Duplicated code is the bane of software development. Stamp out duplication whenever possible. You should always be on the lookout for more subtle cases of near-duplication, too. Don't Repeat Yourself!"
- Reducing Coupling, MartinFlower.com (IEEE Software article):
- "There are several ways to describe coupling, but it boils down to this: If changing one module in a program requires changing another module, then coupling exists. ... Duplication always implies coupling, because changing one piece of duplicate code implies changing the other."
Duplication Overall
- 13% duplication:
- 73,026 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 9,706 duplicated lines
- 48,353 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 197 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 153:447 (37%)156:450 (36%) | view | |
| 142 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 553:803 (26%)569:819 (26%) | view | |
| 65 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 81:150 (12%)83:152 (12%) | view | |
| 61 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 129:213 (26%)111:195 (30%) | view | |
| 40 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 236:282 (17%)327:373 (14%) | view | |
| 39 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 476:529 (7%)488:545 (7%) | view | |
| 38 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 409:448 (9%)396:435 (8%) | view | |
| 35 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 1695:1733 (1%)1787:1824 (1%) | view | |
| 30 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 155:188 (13%)134:168 (11%) | view | |
| 28 | x 2 | compiler/crates/relay-lsp/src/completioncompiler/crates/relay-lsp/src/completion | 170:201 (7%)401:432 (7%) | view | |
| 28 | x 2 | compiler/crates/relay-transforms/srccompiler/crates/relay-transforms/src | 134:165 (7%)311:342 (7%) | view | |
| 27 | x 2 | compiler/crates/relay-lsp/src/completioncompiler/crates/relay-lsp/src/completion | 210:238 (6%)404:432 (6%) | view | |
| 27 | x 2 | compiler/crates/relay-lsp/src/completioncompiler/crates/relay-lsp/src/completion | 173:201 (6%)210:238 (6%) | view | |
| 27 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 23:61 (11%)19:57 (13%) | view | |
| 24 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 128:154 (10%)93:120 (8%) | view | |
| 22 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 483:505 (5%)466:488 (5%) | view | |
| 21 | x 2 | compiler/crates/graphql-ir/srccompiler/crates/graphql-ir/src | 1510:1531 (1%)1643:1664 (1%) | view | |
| 21 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 87:118 (8%)75:106 (10%) | view | |
| 21 | x 2 | compiler/crates/relay-transforms/srccompiler/crates/relay-transforms/src | 145:174 (17%)105:134 (20%) | view | |
| 20 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 385:404 (4%)372:391 (4%) | view | |
| 20 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 319:344 (4%)306:331 (4%) | view | |
| 19 | x 2 | compiler/crates/relay-tr...rc/refetchable_fragmentcompiler/crates/relay-tr...rc/refetchable_fragment | 64:84 (13%)121:141 (12%) | view | |
| 19 | x 2 | compiler/crates/errors/srccompiler/crates/errors/src | 30:51 (13%)65:86 (13%) | view | |
| 19 | x 2 | compiler/crates/relay-transforms/src/validationscompiler/crates/relay-transforms/src/validations | 195:213 (5%)228:246 (5%) | view | |
| 18 | x 2 | packages/relay-runtime/storepackages/relay-runtime/store | 468:500 (2%)561:581 (2%) | view | |
| 17 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 82:98 (<1%)105:121 (<1%) | view | |
| 17 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 531:551 (3%)547:567 (3%) | view | |
| 17 | x 2 | packages/relay-runtime/mutationspackages/relay-runtime/store | 22:38 (7%)45:61 (2%) | view | |
| 17 | x 2 | compiler/crates/graphql-ir/srccompiler/crates/graphql-ir/src | 1039:1056 (1%)1064:1081 (1%) | view | |
| 17 | x 2 | compiler/crates/graphql-ir/srccompiler/crates/graphql-ir/src | 917:934 (1%)988:1005 (1%) | view | |
| 17 | x 2 | compiler/crates/relay-compiler/src/build_projectcompiler/crates/relay-compiler/src/build_project | 600:618 (2%)699:717 (2%) | view | |
| 17 | x 2 | packages/relay-runtime/handlers/connectionpackages/relay-runtime/handlers/connection | 131:149 (8%)201:219 (8%) | view | |
| 16 | x 2 | compiler/crates/graphql-ir/srccompiler/crates/graphql-ir/src | 1487:1503 (1%)1623:1639 (1%) | view | |
| 16 | x 2 | compiler/crates/relay-transforms/src/connectionscompiler/crates/relay-transforms/src/connections | 191:206 (6%)229:244 (6%) | view | |
| 16 | x 2 | compiler/crates/relay-compiler/src/build_projectcompiler/crates/relay-compiler/src/build_project | 490:507 (2%)700:717 (2%) | view | |
| 16 | x 2 | compiler/crates/relay-compiler/src/build_projectcompiler/crates/relay-compiler/src/build_project | 490:507 (2%)601:618 (2%) | view | |
| 16 | x 2 | compiler/crates/relay-lsp/src/completioncompiler/crates/relay-lsp/src/completion | 347:368 (4%)374:395 (4%) | view | |
| 16 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 251:276 (6%)227:252 (8%) | view | |
| 15 | x 2 | compiler/crates/relay-tr...rc/refetchable_fragmentcompiler/crates/relay-tr...rc/refetchable_fragment | 86:100 (10%)143:157 (10%) | view | |
| 15 | x 2 | compiler/crates/schema/src/in_memorycompiler/crates/schema/src/in_memory | 1071:1085 (1%)1102:1116 (1%) | view | |
| 15 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 77:99 (7%)143:165 (7%) | view | |
| 15 | x 2 | website/src/corewebsite/src/core | 106:120 (6%)221:235 (6%) | view | |
| 15 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 129:151 (3%)134:156 (3%) | view | |
| 15 | x 2 | compiler/crates/relay-transforms/src/validationscompiler/crates/relay-transforms/src/validations | 195:209 (4%)250:264 (4%) | view | |
| 15 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 509:525 (3%)491:507 (3%) | view | |
| 15 | x 2 | compiler/crates/relay-transforms/src/validationscompiler/crates/relay-transforms/src/validations | 228:242 (4%)250:264 (4%) | view | |
| 15 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 29:43 (3%)37:51 (3%) | view | |
| 15 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 203:217 (6%)299:313 (5%) | view | |
| 15 | x 2 | packages/relay-runtime/multi-actor-environmentpackages/relay-runtime/multi-actor-environment | 328:342 (3%)355:369 (3%) | view | |
| 15 | x 2 | packages/relay-runtime/storepackages/relay-runtime/s...rimental-live-resolvers | 13:32 (2%)13:32 (2%) | view |
Duplicated Units
The list of top 13 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 66 | x 2 | packages/relay-runtime/s...rimental-live-resolverspackages/relay-runtime/store | 683:776 667:760 | view | |
| 48 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 131:192 149:210 | view | |
| 35 | x 2 | packages/relay-runtime/s...rimental-live-resolverspackages/relay-runtime/store | 620:666 604:650 | view | |
| 24 | x 2 | packages/relay-runtime/s...rimental-live-resolverspackages/relay-runtime/store | 787:820 771:804 | view | |
| 11 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 350:363 337:350 | view | |
| 10 | x 2 | packages/relay-runtime/s...rimental-live-resolverspackages/relay-runtime/store | 63:74 103:114 | view | |
| 10 | x 2 | compiler/crates/relay-transforms/srccompiler/crates/relay-transforms/src | 153:164 113:124 | view | |
| 10 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 141:152 146:157 | view | |
| 9 | x 2 | packages/relay-runtime/s...rimental-live-resolverspackages/relay-runtime/store | 584:594 568:578 | view | |
| 8 | x 2 | compiler/crates/relay-tr...ignable_fragment_spreadcompiler/crates/relay-tr...ignable_fragment_spread | 120:129 138:147 | view | |
| 7 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 287:295 277:285 | view | |
| 7 | x 2 | compiler/crates/relay-typegen/srccompiler/crates/relay-typegen/src | 331:339 318:326 | view | |
| 6 | x 2 | packages/relay-runtime/multi-actor-environmentpackages/relay-runtime/store | 486:493 321:328 | view |