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
- 14% duplication:
- 50,520 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 7,077 duplicated lines
- 6,804 duplicates
Duplication per Extension
Duplication per Component (primary)
Duplication Between Components (50+ lines)
Open 3D force graph...
Show more details on duplication between components...
From Component
--> To Component
Duplicated
Lines
File Pairs
Details
mcrouter/lib/carbon (28%)
--> mcrouter/lib/network (8%)
2843
15 file pairs
details...
mcrouter/lib/routes (7%)
--> mcrouter/routes (<1%)
96
13 file pairs
details...
mcrouter/lib/network (<1%)
--> mcrouter/routes (<1%)
86
7 file pairs
details...
mcrouter/lib/config (1%)
--> mcrouter/routes (<1%)
60
9 file pairs
details...
mcrouter/lib/carbon (<1%)
--> mcrouter/routes (<1%)
52
6 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| mcrouter/lib/carbon (28%) --> mcrouter/lib/network (8%) |
2843 | 15 file pairs | details... |
| mcrouter/lib/routes (7%) --> mcrouter/routes (<1%) |
96 | 13 file pairs | details... |
| mcrouter/lib/network (<1%) --> mcrouter/routes (<1%) |
86 | 7 file pairs | details... |
| mcrouter/lib/config (1%) --> mcrouter/routes (<1%) |
60 | 9 file pairs | details... |
| mcrouter/lib/carbon (<1%) --> mcrouter/routes (<1%) |
52 | 6 file pairs | details... |
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 35 | x 2 | mcrouter/routesmcrouter/routes | 442:476 (6%)532:566 (6%) | view | |
| 33 | x 2 | mcrouter/lib/networkmcrouter/lib/network | 331:370 (5%)524:563 (5%) | view | |
| 31 | x 2 | mcrouter/scriptsmcrouter/scripts | 1:41 (100%)1:41 (100%) | view | |
| 30 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 636:677 (3%)1426:1467 (3%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 90:127 (2%)1352:1389 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:168 (2%)977:1014 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:168 (2%)1051:1088 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:168 (2%)455:492 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:168 (2%)529:566 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 172:209 (2%)258:295 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 455:492 (2%)529:566 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 529:566 (2%)977:1014 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 455:492 (2%)977:1014 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 529:566 (2%)1051:1088 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 455:492 (2%)1051:1088 (2%) | view | |
| 27 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 977:1014 (2%)1051:1088 (2%) | view | |
| 26 | x 2 | mcrouter/lib/networkmcrouter/lib/network | 377:405 (4%)570:598 (4%) | view | |
| 24 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 377:408 (2%)681:712 (2%) | view | |
| 24 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 792:825 (2%)862:895 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 681:710 (2%)1051:1080 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 681:710 (2%)977:1006 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 377:406 (2%)455:484 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 377:406 (2%)529:558 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 377:406 (2%)977:1006 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:160 (2%)681:710 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 131:160 (2%)377:406 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 377:406 (2%)1051:1080 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 529:558 (2%)681:710 (2%) | view | |
| 23 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 455:484 (2%)681:710 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 759:788 (2%)829:858 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 496:525 (2%)726:755 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 496:525 (2%)570:599 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 496:525 (2%)1018:1047 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 726:755 (2%)1158:1187 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 726:755 (2%)1092:1121 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)422:451 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 726:755 (2%)1018:1047 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)726:755 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)570:599 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)496:525 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)1158:1187 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)1092:1121 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 422:451 (2%)496:525 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)1018:1047 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 422:451 (2%)570:599 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 1220:1249 (2%)1286:1315 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)1220:1249 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 726:755 (2%)1286:1315 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 726:755 (2%)1220:1249 (2%) | view | |
| 21 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 231:260 (8%)1286:1315 (2%) | view |
Duplicated Units
The list of top 10 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 28 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 172:203 421:452 | view | |
| 15 | x 2 | mcrouter/lib/carbon/example/genmcrouter/lib/network/gen | 232:249 1124:1141 | view | |
| 9 | x 2 | mcrouter/lib/carbon/examplemcrouter/lib/carbon/example | 52:62 113:123 | view | |
| 9 | x 2 | mcrouter/lib/carbon/examplemcrouter/lib/carbon/example | 63:73 124:134 | view | |
| 9 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 540:550 183:193 | view | |
| 9 | x 5 | mcrouter/routesmcrouter/routesmcrouter/routesmcrouter/routesmcrouter/routes | 24:36 22:34 24:36 24:36 24:36 | view | |
| 6 | x 2 | mcrouter/lib/carbon/example/genmcrouter/lib/network/gen | 162:169 754:761 | view | |
| 6 | x 2 | mcrouter/lib/carbon/example/genmcrouter/lib/network/gen | 269:279 1161:1171 | view | |
| 6 | x 2 | mcrouter/lib/network/genmcrouter/lib/network/gen | 530:537 173:180 | view | |
| 6 | x 2 | mcrouter/lib/routesmcrouter/routes | 52:59 60:67 | view |