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
- 3% duplication:
- 24,755 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 864 duplicated lines
- 96 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 16 | x 2 | bistro/schedulerbistro/scheduler | 26:48 (69%)25:47 (69%) | view | |
| 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/getdepsbuild/fbcode_builder/getdeps | 78:92 (7%)136:149 (7%) | view | |
| 13 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 1:13 (52%)1:13 (38%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 86:97 (6%)53:64 (11%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 115:127 (4%)180:192 (4%) | view | |
| 11 | x 2 | bistro/remotebistro/remote | 18:29 (68%)18:29 (68%) | view | |
| 10 | x 2 | web_ui/src/applications/bistro/view/monitor2_jobweb_ui/src/applications/bistro/view/monitor2_job | 12:23 (4%)9:20 (12%) | view | |
| 10 | x 2 | bistro/runnersbistro/runners | 34:45 (28%)69:80 (11%) | view | |
| 10 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 489:498 (1%)501:510 (1%) | view | |
| 9 | x 2 | bistro/schedulerbistro/scheduler | 29:38 (39%)24:33 (42%) | view | |
| 9 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 291:299 (1%)328:336 (1%) | view | |
| 9 | x 2 | bistro/runnersbistro/runners | 47:56 (25%)111:120 (10%) | view | |
| 9 | x 2 | bistro/schedulerbistro/scheduler | 28:37 (39%)24:33 (42%) | view | |
| 9 | x 2 | bistrobistro/server | 33:41 (8%)33:41 (3%) | view | |
| 9 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 27:35 (5%)29:38 (12%) | view | |
| 9 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 557:566 (1%)221:230 (3%) | view | |
| 9 | x 2 | bistro/runnersbistro/runners | 67:76 (18%)111:120 (10%) | view | |
| 9 | x 2 | bistro/remotebistro/remote | 17:25 (56%)36:45 (30%) | view | |
| 9 | x 2 | bistro/runnersbistro/runners | 67:76 (18%)47:56 (25%) | view | |
| 8 | x 2 | bistro/remotebistro/remote | 22:29 (12%)17:24 (50%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 20:27 (2%)621:628 (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 | bistro/remotebistro/remote | 23:30 (12%)63:70 (11%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)15:22 (2%) | 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%)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/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)256:263 (<1%) | view | |
| 8 | x 2 | bistro/remotebistro/remote | 22:29 (12%)36:43 (26%) | view | |
| 8 | x 2 | bistro/remotebistro/remote | 37:45 (26%)18:25 (50%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 180:187 (<1%)256:263 (<1%) | view | |
| 8 | x 2 | bistro/remotebistro/remote | 62:69 (11%)17:24 (50%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 165:172 (6%)176:183 (6%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 180:187 (<1%)521:528 (<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 | bistro/runnersbistro/runners | 66:72 (16%)17:23 (53%) | view | |
| 7 | x 2 | bistro/serverbistro/server | 70:77 (14%)122:129 (8%) | view | |
| 7 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 312:318 (1%)328:334 (1%) | view | |
| 7 | x 2 | bistro/remotebistro/remote | 23:29 (10%)18:24 (43%) | view | |
| 7 | x 2 | bistro/remotebistro/remote | 18:24 (43%)63:69 (10%) | view | |
| 7 | x 2 | bistro/remotebistro/remote | 37:43 (23%)63:69 (10%) | view | |
| 7 | x 2 | bistro/utilsbistro/worker | 74:80 (11%)103:109 (6%) | view |
