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
- 5% duplication:
- 18,835 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 1,035 duplicated lines
- 89 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 26 | x 2 | wangle/channelwangle/channel | 179:216 (7%)347:384 (7%) | view | |
| 26 | x 2 | wangle/channelwangle/channel | 220:256 (7%)450:486 (7%) | view | |
| 25 | x 2 | wangle/example/echowangle/example/ssl | 34:66 (54%)57:89 (26%) | view | |
| 17 | x 2 | wangle/example/echowangle/example/ssl | 34:54 (65%)55:75 (17%) | view | |
| 15 | x 2 | wangle/channelwangle/channel | 277:299 (4%)397:419 (4%) | view | |
| 15 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 171:185 (8%)40:54 (15%) | view | |
| 14 | x 2 | wangle/example/echowangle/example/telnet | 74:94 (30%)74:95 (29%) | 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 | |
| 13 | x 2 | wangle/cmakewangle/cmake | 1:13 (40%)1:13 (54%) | view | |
| 12 | x 2 | build/fbcode_builder/CMakewangle/cmake | 2:13 (48%)2:13 (37%) | view | |
| 12 | x 2 | build/fbcode_builder/CMakewangle/cmake | 2:13 (35%)2:13 (37%) | view | |
| 12 | x 2 | build/fbcode_builder/CMakewangle/cmake | 2:13 (35%)2:13 (50%) | view | |
| 12 | x 2 | build/fbcode_builder/CMakewangle/cmake | 2:13 (48%)2:13 (50%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 86:97 (6%)53:64 (11%) | view | |
| 11 | x 2 | wangle/channelwangle/channel | 303:318 (3%)490:505 (3%) | view | |
| 11 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 115:127 (4%)180:192 (4%) | view | |
| 10 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 489:498 (1%)501:510 (1%) | 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 | |
| 9 | x 2 | wangle/example/rpcwangle/example/rpc | 42:51 (14%)64:73 (22%) | view | |
| 9 | x 2 | build/fbcode_builder/CMakebuild/fbcode_builder/CMake | 557:566 (1%)221:230 (3%) | view | |
| 9 | x 2 | wangle/channelwangle/channel | 60:71 (9%)122:133 (9%) | view | |
| 8 | x 2 | wangle/acceptorwangle/acceptor | 200:208 (5%)111:119 (10%) | 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 | 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 | wangle/channelwangle/channel | 74:108 (8%)149:158 (8%) | 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 | wangle/channelwangle/channel | 187:196 (6%)48:57 (11%) | view | |
| 8 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 22:29 (<1%)256:263 (<1%) | view | |
| 8 | x 2 | wangle/channelwangle/channel | 38:46 (14%)95:103 (14%) | 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_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 | wangle/example/sslwangle/example/telnet | 165:174 (7%)85:95 (14%) | view | |
| 7 | x 2 | wangle/example/echowangle/example/ssl | 84:94 (15%)165:174 (7%) | view | |
| 7 | x 2 | build/fbcode_builder/getdepsbuild/fbcode_builder/getdeps | 312:318 (1%)328:334 (1%) | view | |
| 7 | x 2 | wangle/bootstrapwangle/bootstrap | 47:53 (10%)90:96 (10%) | view | |
| 7 | x 2 | wangle/example/echowangle/example/telnet | 42:50 (15%)41:49 (14%) | view |
Duplicated Units
The list of top 4 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 22 | x 2 | wangle/example/echowangle/example/telnet | 68:95 68:96 | view | |
| 9 | x 2 | wangle/example/sslwangle/example/echo | 78:88 55:65 | view | |
| 7 | x 2 | wangle/example/sslwangle/example/echo | 66:74 45:53 | view | |
| 6 | x 4 | wangle/example/echowangle/example/filewangle/example/rpcwangle/example/telnet | 56:65 99:108 91:100 70:79 | view |