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
- 99% duplication:
- 20,104 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 20,020 duplicated lines
- 934 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
AVR_ATMega4809_Atmel_Studio/RTOSDemo (98%)
--> AVR_Dx_Atmel_Studio/RTOSDemo (98%)
10330
31 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (73%)
--> AVR_Dx_MPLAB.X/TraceRecorder (105%)
7725
11 file pairs
details...
AVR_ATMega4809_MPLAB.X/TraceRecorder (105%)
--> AVR_Dx_Atmel_Studio/RTOSDemo (73%)
7725
11 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (73%)
--> AVR_ATMega4809_MPLAB.X/TraceRecorder (105%)
7725
11 file pairs
details...
AVR_Dx_Atmel_Studio/RTOSDemo (73%)
--> AVR_Dx_MPLAB.X/TraceRecorder (105%)
7725
11 file pairs
details...
AVR_ATMega4809_MPLAB.X/TraceRecorder (99%)
--> AVR_Dx_MPLAB.X/TraceRecorder (99%)
7332
11 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (10%)
--> AVR_ATMega4809_MPLAB.X (97%)
1126
13 file pairs
details...
AVR_Dx_Atmel_Studio/RTOSDemo (10%)
--> AVR_Dx_MPLAB.X (94%)
1094
13 file pairs
details...
AVR_ATMega4809_MPLAB.X (93%)
--> AVR_Dx_MPLAB.X (92%)
1074
12 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (10%)
--> AVR_Dx_MPLAB.X (92%)
1070
12 file pairs
details...
AVR_ATMega4809_MPLAB.X (92%)
--> AVR_Dx_Atmel_Studio/RTOSDemo (10%)
1062
12 file pairs
details...
AVR_Dx_Atmel_Studio/RTOSDemo (7%)
--> AVR_Dx_MPLAB.X/cli (99%)
794
4 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (7%)
--> AVR_Dx_MPLAB.X/cli (99%)
794
4 file pairs
details...
AVR_ATMega4809_MPLAB.X/cli (99%)
--> AVR_Dx_Atmel_Studio/RTOSDemo (7%)
781
4 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (7%)
--> AVR_ATMega4809_MPLAB.X/cli (99%)
781
4 file pairs
details...
AVR_ATMega4809_MPLAB.X/cli (99%)
--> AVR_Dx_MPLAB.X/cli (98%)
781
4 file pairs
details...
AVR_ATMega4809_MPLAB.X/serial (100%)
--> AVR_Dx_MPLAB.X/serial (100%)
332
3 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (3%)
--> AVR_Dx_MPLAB.X/serial (100%)
332
3 file pairs
details...
AVR_ATMega4809_Atmel_Studio/RTOSDemo (3%)
--> AVR_ATMega4809_MPLAB.X/serial (100%)
332
3 file pairs
details...
AVR_ATMega4809_MPLAB.X/serial (97%)
--> AVR_Dx_Atmel_Studio/RTOSDemo (3%)
324
3 file pairs
details...
AVR_Dx_Atmel_Studio/RTOSDemo (3%)
--> AVR_Dx_MPLAB.X/serial (97%)
324
3 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (98%) --> AVR_Dx_Atmel_Studio/RTOSDemo (98%) |
10330 | 31 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (73%) --> AVR_Dx_MPLAB.X/TraceRecorder (105%) |
7725 | 11 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/TraceRecorder (105%) --> AVR_Dx_Atmel_Studio/RTOSDemo (73%) |
7725 | 11 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (73%) --> AVR_ATMega4809_MPLAB.X/TraceRecorder (105%) |
7725 | 11 file pairs | details... |
| AVR_Dx_Atmel_Studio/RTOSDemo (73%) --> AVR_Dx_MPLAB.X/TraceRecorder (105%) |
7725 | 11 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/TraceRecorder (99%) --> AVR_Dx_MPLAB.X/TraceRecorder (99%) |
7332 | 11 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (10%) --> AVR_ATMega4809_MPLAB.X (97%) |
1126 | 13 file pairs | details... |
| AVR_Dx_Atmel_Studio/RTOSDemo (10%) --> AVR_Dx_MPLAB.X (94%) |
1094 | 13 file pairs | details... |
| AVR_ATMega4809_MPLAB.X (93%) --> AVR_Dx_MPLAB.X (92%) |
1074 | 12 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (10%) --> AVR_Dx_MPLAB.X (92%) |
1070 | 12 file pairs | details... |
| AVR_ATMega4809_MPLAB.X (92%) --> AVR_Dx_Atmel_Studio/RTOSDemo (10%) |
1062 | 12 file pairs | details... |
| AVR_Dx_Atmel_Studio/RTOSDemo (7%) --> AVR_Dx_MPLAB.X/cli (99%) |
794 | 4 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (7%) --> AVR_Dx_MPLAB.X/cli (99%) |
794 | 4 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/cli (99%) --> AVR_Dx_Atmel_Studio/RTOSDemo (7%) |
781 | 4 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (7%) --> AVR_ATMega4809_MPLAB.X/cli (99%) |
781 | 4 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/cli (99%) --> AVR_Dx_MPLAB.X/cli (98%) |
781 | 4 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/serial (100%) --> AVR_Dx_MPLAB.X/serial (100%) |
332 | 3 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (3%) --> AVR_Dx_MPLAB.X/serial (100%) |
332 | 3 file pairs | details... |
| AVR_ATMega4809_Atmel_Studio/RTOSDemo (3%) --> AVR_ATMega4809_MPLAB.X/serial (100%) |
332 | 3 file pairs | details... |
| AVR_ATMega4809_MPLAB.X/serial (97%) --> AVR_Dx_Atmel_Studio/RTOSDemo (3%) |
324 | 3 file pairs | details... |
| AVR_Dx_Atmel_Studio/RTOSDemo (3%) --> AVR_Dx_MPLAB.X/serial (97%) |
324 | 3 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 1152 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder |  trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 1152 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 1152 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 1152 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 1152 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 1152 | x 2 | AVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.c |
62:3069 (100%)62:3069 (100%) | view |
| 866 | x 2 | AVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder/includeAVR_Dx_MPLAB.X/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 866 | x 2 | AVR_ATMega4809_Atmel_Stu...o/TraceRecorder/includeAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 866 | x 2 | AVR_ATMega4809_Atmel_Stu...o/TraceRecorder/includeAVR_ATMega4809_MPLAB.X/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 866 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorder/includeAVR_Dx_MPLAB.X/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 866 | x 2 | AVR_ATMega4809_Atmel_Stu...o/TraceRecorder/includeAVR_Dx_MPLAB.X/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 866 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorder/includeAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder/include | trcKernelPort.htrcKernelPort.h |
52:2767 (100%)52:2767 (100%) | view |
| 786 | x 2 | AVR_ATMega4809_Atmel_Stu...o/TraceRecorder/includeAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder/include | trcRecorder.htrcRecorder.h |
49:3756 (100%)49:3756 (100%) | view |
| 761 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 761 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 761 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 761 | x 2 | AVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 761 | x 2 | AVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_MPLAB.X/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 761 | x 2 | AVR_ATMega4809_MPLAB.X/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.c |
57:2029 (100%)57:2029 (100%) | view |
| 393 | x 2 | AVR_ATMega4809_Atmel_Stu...o/TraceRecorder/includeAVR_Dx_MPLAB.X/TraceRecorder/include | trcRecorder.htrcRecorder.h |
150:1952 (50%)49:1851 (100%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 151 | x 4 | AVR_Dx_MPLAB.XAVR_ATMega4809_MPLAB.XAVR_ATMega4809_Atmel_Studio/RTOSDemoAVR_Dx_Atmel_Studio/RTOSDemo | regtest.cregtest.cregtest.cregtest.c |
72:226 72:226 72:226 72:226 | view |
| 151 | x 4 | AVR_Dx_MPLAB.XAVR_ATMega4809_MPLAB.XAVR_ATMega4809_Atmel_Studio/RTOSDemoAVR_Dx_Atmel_Studio/RTOSDemo | regtest.cregtest.cregtest.cregtest.c |
229:383 229:383 229:383 229:383 | view |
| 126 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
858:1007 858:1007 858:1007 858:1007 | view |
| 88 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
2111:2230 2111:2230 2111:2230 2111:2230 | view |
| 68 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
1309:1422 1309:1422 1309:1422 1309:1422 | view |
| 67 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
2604:2707 2604:2707 2604:2707 2604:2707 | view |
| 64 | x 4 | AVR_Dx_MPLAB.X/cliAVR_ATMega4809_MPLAB.X/cliAVR_ATMega4809_Atmel_Studio/RTOSDemo/cliAVR_Dx_Atmel_Studio/RTOSDemo/cli | UARTCommandConsole.cUARTCommandConsole.cUARTCommandConsole.cUARTCommandConsole.c |
85:190 68:172 67:171 85:190 | view |
| 63 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.ctrcStreamingRecorder.ctrcStreamingRecorder.c |
1314:1401 1314:1401 1314:1401 1314:1401 | view |
| 61 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcStreamingRecorder.ctrcStreamingRecorder.ctrcStreamingRecorder.ctrcStreamingRecorder.c |
1404:1492 1404:1492 1404:1492 1404:1492 | view |
| 59 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
2963:3070 2963:3070 2963:3070 2963:3070 | view |
| 55 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcKernelPort.ctrcKernelPort.ctrcKernelPort.ctrcKernelPort.c |
460:540 460:540 460:540 462:542 | view |
| 52 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
1625:1693 1625:1693 1625:1693 1625:1693 | view |
| 50 | x 4 | AVR_Dx_MPLAB.X/cliAVR_ATMega4809_MPLAB.X/cliAVR_ATMega4809_Atmel_Studio/RTOSDemo/cliAVR_Dx_Atmel_Studio/RTOSDemo/cli | Sample-CLI-commands.cSample-CLI-commands.cSample-CLI-commands.cSample-CLI-commands.c |
400:474 387:461 400:474 400:474 | view |
| 47 | x 4 | AVR_Dx_MPLAB.X/cliAVR_ATMega4809_MPLAB.X/cliAVR_ATMega4809_Atmel_Studio/RTOSDemo/cliAVR_Dx_Atmel_Studio/RTOSDemo/cli | FreeRTOS_CLI.cFreeRTOS_CLI.cFreeRTOS_CLI.cFreeRTOS_CLI.c |
147:219 147:219 146:218 147:219 | view |
| 46 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
622:687 622:687 622:687 622:687 | view |
| 41 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
1906:1956 1906:1956 1906:1956 1906:1956 | view |
| 40 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcKernelPort.ctrcKernelPort.ctrcKernelPort.ctrcKernelPort.c |
970:1010 970:1010 970:1010 972:1012 | view |
| 39 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
126:204 126:204 126:204 126:204 | view |
| 39 | x 4 | AVR_Dx_MPLAB.X/TraceRecorderAVR_ATMega4809_MPLAB.X/TraceRecorderAVR_ATMega4809_Atmel_Studio/RTOSDemo/TraceRecorderAVR_Dx_Atmel_Studio/RTOSDemo/TraceRecorder | trcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.ctrcSnapshotRecorder.c |
543:598 543:598 543:598 543:598 | view |
| 39 | x 4 | AVR_Dx_MPLAB.X/cliAVR_ATMega4809_MPLAB.X/cliAVR_ATMega4809_Atmel_Studio/RTOSDemo/cliAVR_Dx_Atmel_Studio/RTOSDemo/cli | Sample-CLI-commands.cSample-CLI-commands.cSample-CLI-commands.cSample-CLI-commands.c |
212:276 199:263 212:276 212:276 | view |