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
- 4% duplication:
- 11,033 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 504 duplicated lines
- 54 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 15 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 171:185 (8%)40:54 (15%) | view | |
| 14 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 722:735 (1%)1208:1221 (1%) | view | |
| 13 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 1:13 (52%)1:13 (38%) | view | |
| 13 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 78:92 (7%)136:149 (7%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 115:127 (4%)180:192 (4%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 86:97 (6%)53:64 (11%) | view | |
| 10 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 489:498 (1%)501:510 (1%) | view | |
| 9 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 557:566 (1%)221:230 (3%) | view | |
| 9 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 291:299 (1%)328:336 (1%) | view | |
| 9 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 27:35 (5%)29:38 (12%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 20:27 (2%)621:628 (1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)256:263 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 117:124 (4%)89:96 (8%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)180:187 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)15:22 (2%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 180:187 (<1%)256:263 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 165:172 (6%)176:183 (6%) | view | |
| 8 | x 2 | build/fbcode_builderbuild/fbcode_builder | 481:489 (<1%)502:510 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 180:187 (<1%)521:528 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 180:187 (<1%)15:22 (2%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 289:297 (1%)310:318 (1%) | view | |
| 8 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 128:135 (2%)194:201 (2%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 521:528 (<1%)15:22 (2%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 256:263 (<1%)521:528 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)521:528 (<1%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 256:263 (<1%)15:22 (2%) | view | |
| 7 | x 2 | build/fbcode_builderbuild/fbcode_builder | 504:510 (<1%)525:531 (<1%) | view | |
| 7 | x 2 | fbzmq/service/statsfbzmq/service/stats | 20:28 (12%)55:63 (12%) | view | |
| 7 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 312:318 (1%)328:334 (1%) | view | |
| 7 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 109:115 (3%)81:87 (7%) | view | |
| 7 | x 2 | build/fbcode_builderbuild/fbcode_builder | 483:489 (<1%)525:531 (<1%) | view | |
| 6 | x 2 | build/fbcode_builderbuild/fbcode_builder | 494:500 (<1%)515:521 (<1%) | view | |
| 6 | x 2 | fbzmq/service/statsfbzmq/service/stats | 20:25 (10%)41:46 (10%) | view | |
| 6 | x 2 | build/fbcode_builderbuild/fbcode_builder | 473:479 (<1%)494:500 (<1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 548:553 (1%)618:623 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 537:542 (1%)618:623 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 139:147 (6%)159:167 (6%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 537:542 (1%)548:553 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 519:524 (1%)618:623 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 1:7 (54%)1:7 (66%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 519:524 (1%)537:542 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 182:187 (<1%)535:540 (<1%) | view | |
| 6 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 65:70 (8%)74:79 (8%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 519:524 (1%)548:553 (1%) | view | |
| 6 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 1:7 (54%)1:7 (85%) | view | |
| 6 | x 2 | build/fbcode_builderbuild/fbcode_builder | 473:479 (<1%)515:521 (<1%) | view | |
| 6 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 1:7 (66%)1:7 (85%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 258:263 (<1%)535:540 (<1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 523:528 (<1%)535:540 (<1%) | view | |
| 6 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 535:540 (<1%)17:22 (2%) | view |
