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
- 32% duplication:
- 72,793 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 23,731 duplicated lines
- 1,328 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
native-codec (26%)
--> native-media (25%)
352
2 file pairs
details...
gles3jni (18%)
--> teapots (<1%)
315
2 file pairs
details...
bitmap-plasma (70%)
--> native-plasma (58%)
288
1 file pair
details...
display-p3 (7%)
--> teapots (<1%)
178
6 file pairs
details...
camera (2%)
--> teapots (<1%)
96
5 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| native-codec (26%) --> native-media (25%) |
352 | 2 file pairs | details... |
| gles3jni (18%) --> teapots (<1%) |
315 | 2 file pairs | details... |
| bitmap-plasma (70%) --> native-plasma (58%) |
288 | 1 file pair | details... |
| display-p3 (7%) --> teapots (<1%) |
178 | 6 file pairs | details... |
| camera (2%) --> teapots (<1%) |
96 | 5 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 2028 | x 2 | teapots/image-decoder/src/main/cppteapots/textured-teapot/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/image-decoder/src/main/cppteapots/more-teapots/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/textured-teapot/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/more-teapots/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/more-teapots/src/main/cppteapots/textured-teapot/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/classic-teapot/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/classic-teapot/src/main/cppteapots/more-teapots/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/image-decoder/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/classic-teapot/src/main/cppteapots/image-decoder/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 2028 | x 2 | teapots/classic-teapot/src/main/cppteapots/textured-teapot/src/main/cpp | inl teapot.inlteapot.inl |
23:2057 (100%)23:2057 (100%) | view |
| 395 | x 2 | teapots/common/ndk_helperteapots/common/ndk_helper |  gl3stub.cgl3stub.cpp |
20:421 (100%)20:421 (100%) | view |
| 189 | x 2 | teapots/choreographer-30.../java/com/sample/helperteapots/image-decoder/sr.../java/com/sample/helper |  NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/classic-teapot/s.../java/com/sample/helperteapots/image-decoder/sr.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/more-teapots/src.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/image-decoder/sr.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/image-decoder/sr.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/classic-teapot/s.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/classic-teapot/s.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/choreographer-30.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
| 189 | x 2 | teapots/choreographer-30.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helper | NDKHelper.javaNDKHelper.java |
48:358 (100%)48:358 (100%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 51 | x 2 | teapots/image-decoder/src/main/cppteapots/textured-teapot/src/main/cpp |  TeapotRenderer.cppTeapotRenderer.cpp |
202:276 200:274 | view |
| 49 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/classic-teapot/src/main/cpp | TeapotRenderer.cppTeapotRenderer.cpp |
192:264 192:264 | view |
| 42 | x 4 | teapots/image-decoder/src/main/cppteapots/classic-teapot/src/main/cppteapots/more-teapots/src/main/cppteapots/textured-teapot/src/main/cpp | TeapotNativeActivity.cppTeapotNativeActivity.cppMoreTeapotsNativeActivity.cppTeapotNativeActivity.cpp |
198:250 199:251 209:261 199:251 | view |
| 35 | x 2 | camera/texture-view/src/main/cppcamera/basic/src/main/cpp | camera_manager.cppcamera_manager.cpp |
333:373 309:349 | view |
| 33 | x 5 | teapots/image-decoder/sr.../java/com/sample/helperteapots/choreographer-30.../java/com/sample/helperteapots/classic-teapot/s.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.java |
159:206 159:206 159:206 159:206 159:206 | view |
| 32 | x 5 | teapots/image-decoder/sr.../java/com/sample/helperteapots/choreographer-30.../java/com/sample/helperteapots/classic-teapot/s.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.java |
208:244 208:244 208:244 208:244 208:244 | view |
| 32 | x 2 | teapots/choreographer-30fps/src/main/cppteapots/classic-teapot/src/main/cpp | TeapotRenderer.cppTeapotRenderer.cpp |
41:84 41:84 | view |
| 31 | x 4 | teapots/image-decoder/src/main/cppteapots/classic-teapot/src/main/cppteapots/more-teapots/src/main/cppteapots/textured-teapot/src/main/cpp | TeapotNativeActivity.cppTeapotNativeActivity.cppMoreTeapotsNativeActivity.cppTeapotNativeActivity.cpp |
255:291 256:292 266:302 256:292 | view |
| 31 | x 2 | teapots/classic-teapot/src/main/cppteapots/textured-teapot/src/main/cpp | TeapotNativeActivity.cppTeapotNativeActivity.cpp |
122:163 122:163 | view |
| 29 | x 2 | teapots/classic-teapot/src/main/cppteapots/textured-teapot/src/main/cpp | TeapotRenderer.cppTeapotRenderer.cpp |
141:190 149:198 | view |
| 28 | x 5 | teapots/image-decoder/sr.../java/com/sample/helperteapots/choreographer-30.../java/com/sample/helperteapots/classic-teapot/s.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.java |
118:157 118:157 118:157 118:157 118:157 | view |
| 27 | x 3 | teapots/image-decoder/src/main/cppteapots/classic-teapot/src/main/cppteapots/textured-teapot/src/main/cpp | TeapotNativeActivity.cppTeapotNativeActivity.cppTeapotNativeActivity.cpp |
389:436 390:438 390:438 | view |
| 26 | x 2 | native-codec/app/src/mai...com/example/nativecodecnative-media/app/src/mai...com/example/nativemedia | MyGLSurfaceView.javaMyGLSurfaceView.java |
251:278 240:267 | view |
| 26 | x 2 | display-p3/image-view/src/main/cppteapots/textured-teapot/src/main/cpp | AssetUtil.cppAssetUtil.cpp |
30:62 30:62 | view |
| 24 | x 4 | teapots/image-decoder/sr...com/sample/imagedecoderteapots/classic-teapot/s.../java/com/sample/teapotteapots/more-teapots/src.../com/sample/moreteapotsteapots/textured-teapot/...m/sample/texturedteapot | TeapotNativeActivity.javaTeapotNativeActivity.javaMoreTeapotsNativeActivity.javaTeapotNativeActivity.java |
92:123 92:123 98:129 92:123 | view |
| 21 | x 2 | endless-tunnel/app/src/main/cpp/glm/gtxendless-tunnel/app/src/main/cpp/glm/gtx | inl bit.inlbit.inl |
450:477 480:507 | view |
| 21 | x 2 | camera/texture-view/src/.../com/sample/textureviewcamera/basic/src/main/java/com/sample/camera/basic | ViewActivity.javaCameraActivity.java |
75:96 126:147 | view |
| 20 | x 2 | camera/texture-view/src/main/cppcamera/basic/src/main/cpp | camera_listeners.cppcamera_listeners.cpp |
96:119 96:119 | view |
| 19 | x 2 | bitmap-plasma/app/src/main/cppnative-plasma/app/src/main/cpp | plasma.cplasma.c |
147:170 153:176 | view |
| 18 | x 5 | teapots/image-decoder/sr.../java/com/sample/helperteapots/choreographer-30.../java/com/sample/helperteapots/classic-teapot/s.../java/com/sample/helperteapots/more-teapots/src.../java/com/sample/helperteapots/textured-teapot/.../java/com/sample/helper | NDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.javaNDKHelper.java |
246:267 246:267 246:267 246:267 246:267 | view |