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
- 28% duplication:
- 32,382 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 9,077 duplicated lines
- 9,779 duplicates
Duplication per Extension
Duplication per Component (primary)
Longest Duplicates
The list of 50 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 934 | x 2 | ext/gtest-1.8.0/googlemock/scriptsext/gtest-1.8.0/googletest/scripts | 49:1387 (100%)49:1387 (100%) | view | |
| 80 | x 2 | ext/gtest-1.8.0/googlemock/scriptsext/gtest-1.8.0/googletest/scripts | 60:153 (33%)60:153 (37%) | view | |
| 49 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2999:3047 (1%)3103:3151 (1%) | view | |
| 48 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2896:2943 (1%)2999:3046 (1%) | view | |
| 48 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2896:2943 (1%)3103:3150 (1%) | view | |
| 47 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2794:2840 (1%)3103:3149 (1%) | view | |
| 47 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2794:2840 (1%)2999:3045 (1%) | view | |
| 47 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2794:2840 (1%)2896:2942 (1%) | view | |
| 46 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2694:2739 (1%)3103:3148 (1%) | view | |
| 46 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2694:2739 (1%)2794:2839 (1%) | view | |
| 46 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2694:2739 (1%)2896:2941 (1%) | view | |
| 46 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2694:2739 (1%)2999:3044 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googlemock/msvc/2010ext/gtest-1.8.0/googlemock/msvc/2015 | 28:86 (68%)30:88 (66%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 4408:4467 (1%)4654:4714 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2596:2640 (1%)3103:3147 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2596:2640 (1%)2999:3043 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2596:2640 (1%)2794:2838 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2596:2640 (1%)2896:2940 (1%) | view | |
| 45 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2596:2640 (1%)2694:2738 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)2596:2639 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)2694:2737 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)2794:2837 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)2896:2939 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)2999:3042 (1%) | view | |
| 44 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2500:2543 (1%)3103:3146 (1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2896:2938 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2999:3041 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2694:2736 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2794:2836 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2500:2542 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)2596:2638 (<1%) | view | |
| 43 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2406:2448 (<1%)3103:3145 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2406:2447 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2500:2541 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2794:2835 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2896:2937 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2596:2637 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2694:2735 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)2999:3040 (<1%) | view | |
| 42 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2314:2355 (<1%)3103:3144 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2500:2540 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2596:2636 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2694:2734 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2406:2446 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2999:3039 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)3103:3143 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2794:2834 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 2223:2263 (<1%)2896:2936 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 4183:4237 (<1%)4658:4713 (<1%) | view | |
| 41 | x 2 | ext/gtest-1.8.0/googletest/include/gtest/internalext/gtest-1.8.0/googletest/include/gtest/internal | 4183:4237 (<1%)4411:4466 (<1%) | view |
Duplicated Units
The list of top 1 duplicated units.