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
- 97% duplication:
- 26,067 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 25,487 duplicated lines
- 11,494 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
Azure_DevOps_Server_2019 (97%)
--> TFS_2018Update3 (98%)
8890
281 file pairs
details...
TFS_2018Update2 (96%)
--> TFS_2018Update3 (96%)
8664
282 file pairs
details...
Azure_DevOps_Server_2019 (94%)
--> TFS_2018Update2 (95%)
8584
282 file pairs
details...
TFS_2018RTW (98%)
--> TFS_2018Update1 (96%)
7715
297 file pairs
details...
TFS_2018RTW (96%)
--> TFS_2018Update2 (84%)
7542
292 file pairs
details...
TFS_2018Update1 (94%)
--> TFS_2018Update3 (83%)
7523
289 file pairs
details...
TFS_2018Update1 (93%)
--> TFS_2018Update2 (83%)
7465
292 file pairs
details...
Azure_DevOps_Server_2019 (81%)
--> TFS_2018Update1 (93%)
7437
289 file pairs
details...
TFS_2018RTW (92%)
--> TFS_2018Update3 (80%)
7262
280 file pairs
details...
Azure_DevOps_Server_2019 (79%)
--> TFS_2018RTW (91%)
7188
280 file pairs
details...
TFS_2017Update3 (100%)
--> TFS_2018RTW (34%)
2690
79 file pairs
details...
TFS_2017Update3 (99%)
--> TFS_2018Update1 (33%)
2650
79 file pairs
details...
TFS_2017Update3 (97%)
--> TFS_2018Update2 (29%)
2606
71 file pairs
details...
TFS_2017Update3 (96%)
--> TFS_2018Update3 (28%)
2574
78 file pairs
details...
Azure_DevOps_Server_2019 (28%)
--> TFS_2017Update3 (95%)
2560
78 file pairs
details...
TFS_2017Update2 (101%)
--> TFS_2018RTW (30%)
2423
63 file pairs
details...
TFS_2017Update2 (100%)
--> TFS_2017Update3 (90%)
2411
60 file pairs
details...
TFS_2017Update2 (99%)
--> TFS_2018Update1 (29%)
2383
63 file pairs
details...
TFS_2017Update2 (97%)
--> TFS_2018Update2 (26%)
2341
55 file pairs
details...
TFS_2017Update2 (96%)
--> TFS_2018Update3 (25%)
2309
60 file pairs
details...
Azure_DevOps_Server_2019 (25%)
--> TFS_2017Update2 (95%)
2295
60 file pairs
details...
TFS_2017RTW (97%)
--> TFS_2017Update1 (83%)
1602
38 file pairs
details...
TFS_2017Update1 (73%)
--> TFS_2018RTW (18%)
1424
62 file pairs
details...
TFS_2017Update1 (73%)
--> TFS_2017Update3 (53%)
1420
57 file pairs
details...
TFS_2017Update1 (73%)
--> TFS_2017Update2 (59%)
1417
45 file pairs
details...
TFS_2017Update1 (71%)
--> TFS_2018Update1 (17%)
1384
62 file pairs
details...
TFS_2017RTW (84%)
--> TFS_2018RTW (17%)
1384
46 file pairs
details...
TFS_2017RTW (83%)
--> TFS_2017Update3 (51%)
1381
43 file pairs
details...
TFS_2017RTW (83%)
--> TFS_2017Update2 (57%)
1380
35 file pairs
details...
TFS_2017Update1 (71%)
--> TFS_2018Update2 (15%)
1375
58 file pairs
details...
Azure_DevOps_Server_2019 (14%)
--> TFS_2017Update1 (69%)
1345
64 file pairs
details...
TFS_2017RTW (81%)
--> TFS_2018Update1 (16%)
1344
46 file pairs
details...
TFS_2017Update1 (69%)
--> TFS_2018Update3 (14%)
1343
64 file pairs
details...
TFS_2017RTW (81%)
--> TFS_2018Update2 (14%)
1334
42 file pairs
details...
Azure_DevOps_Server_2019 (14%)
--> TFS_2017RTW (79%)
1303
46 file pairs
details...
TFS_2017RTW (79%)
--> TFS_2018Update3 (14%)
1301
46 file pairs
details...
HealthCheck (8%)
--> TFS_2018Update1 (<1%)
56
2 file pairs
details...
HealthCheck (8%)
--> TFS_2017Update3 (2%)
56
2 file pairs
details...
HealthCheck (8%)
--> TFS_2018RTW (<1%)
56
2 file pairs
details...
Azure_DevOps_Server_2019 (<1%)
--> HealthCheck (8%)
54
2 file pairs
details...
HealthCheck (8%)
--> TFS_2018Update2 (<1%)
54
2 file pairs
details...
HealthCheck (8%)
--> TFS_2018Update3 (<1%)
54
2 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| Azure_DevOps_Server_2019 (97%) --> TFS_2018Update3 (98%) |
8890 | 281 file pairs | details... |
| TFS_2018Update2 (96%) --> TFS_2018Update3 (96%) |
8664 | 282 file pairs | details... |
| Azure_DevOps_Server_2019 (94%) --> TFS_2018Update2 (95%) |
8584 | 282 file pairs | details... |
| TFS_2018RTW (98%) --> TFS_2018Update1 (96%) |
7715 | 297 file pairs | details... |
| TFS_2018RTW (96%) --> TFS_2018Update2 (84%) |
7542 | 292 file pairs | details... |
| TFS_2018Update1 (94%) --> TFS_2018Update3 (83%) |
7523 | 289 file pairs | details... |
| TFS_2018Update1 (93%) --> TFS_2018Update2 (83%) |
7465 | 292 file pairs | details... |
| Azure_DevOps_Server_2019 (81%) --> TFS_2018Update1 (93%) |
7437 | 289 file pairs | details... |
| TFS_2018RTW (92%) --> TFS_2018Update3 (80%) |
7262 | 280 file pairs | details... |
| Azure_DevOps_Server_2019 (79%) --> TFS_2018RTW (91%) |
7188 | 280 file pairs | details... |
| TFS_2017Update3 (100%) --> TFS_2018RTW (34%) |
2690 | 79 file pairs | details... |
| TFS_2017Update3 (99%) --> TFS_2018Update1 (33%) |
2650 | 79 file pairs | details... |
| TFS_2017Update3 (97%) --> TFS_2018Update2 (29%) |
2606 | 71 file pairs | details... |
| TFS_2017Update3 (96%) --> TFS_2018Update3 (28%) |
2574 | 78 file pairs | details... |
| Azure_DevOps_Server_2019 (28%) --> TFS_2017Update3 (95%) |
2560 | 78 file pairs | details... |
| TFS_2017Update2 (101%) --> TFS_2018RTW (30%) |
2423 | 63 file pairs | details... |
| TFS_2017Update2 (100%) --> TFS_2017Update3 (90%) |
2411 | 60 file pairs | details... |
| TFS_2017Update2 (99%) --> TFS_2018Update1 (29%) |
2383 | 63 file pairs | details... |
| TFS_2017Update2 (97%) --> TFS_2018Update2 (26%) |
2341 | 55 file pairs | details... |
| TFS_2017Update2 (96%) --> TFS_2018Update3 (25%) |
2309 | 60 file pairs | details... |
| Azure_DevOps_Server_2019 (25%) --> TFS_2017Update2 (95%) |
2295 | 60 file pairs | details... |
| TFS_2017RTW (97%) --> TFS_2017Update1 (83%) |
1602 | 38 file pairs | details... |
| TFS_2017Update1 (73%) --> TFS_2018RTW (18%) |
1424 | 62 file pairs | details... |
| TFS_2017Update1 (73%) --> TFS_2017Update3 (53%) |
1420 | 57 file pairs | details... |
| TFS_2017Update1 (73%) --> TFS_2017Update2 (59%) |
1417 | 45 file pairs | details... |
| TFS_2017Update1 (71%) --> TFS_2018Update1 (17%) |
1384 | 62 file pairs | details... |
| TFS_2017RTW (84%) --> TFS_2018RTW (17%) |
1384 | 46 file pairs | details... |
| TFS_2017RTW (83%) --> TFS_2017Update3 (51%) |
1381 | 43 file pairs | details... |
| TFS_2017RTW (83%) --> TFS_2017Update2 (57%) |
1380 | 35 file pairs | details... |
| TFS_2017Update1 (71%) --> TFS_2018Update2 (15%) |
1375 | 58 file pairs | details... |
| Azure_DevOps_Server_2019 (14%) --> TFS_2017Update1 (69%) |
1345 | 64 file pairs | details... |
| TFS_2017RTW (81%) --> TFS_2018Update1 (16%) |
1344 | 46 file pairs | details... |
| TFS_2017Update1 (69%) --> TFS_2018Update3 (14%) |
1343 | 64 file pairs | details... |
| TFS_2017RTW (81%) --> TFS_2018Update2 (14%) |
1334 | 42 file pairs | details... |
| Azure_DevOps_Server_2019 (14%) --> TFS_2017RTW (79%) |
1303 | 46 file pairs | details... |
| TFS_2017RTW (79%) --> TFS_2018Update3 (14%) |
1301 | 46 file pairs | details... |
| HealthCheck (8%) --> TFS_2018Update1 (<1%) |
56 | 2 file pairs | details... |
| HealthCheck (8%) --> TFS_2017Update3 (2%) |
56 | 2 file pairs | details... |
| HealthCheck (8%) --> TFS_2018RTW (<1%) |
56 | 2 file pairs | details... |
| Azure_DevOps_Server_2019 (<1%) --> HealthCheck (8%) |
54 | 2 file pairs | details... |
| HealthCheck (8%) --> TFS_2018Update2 (<1%) |
54 | 2 file pairs | details... |
| HealthCheck (8%) --> TFS_2018Update3 (<1%) |
54 | 2 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 639 | x 2 | TFS_2018Update2/Troubleshooting/UtilsTFS_2018Update3/Troubleshooting/Utils |  Common.psm1Common.psm1 |
308:1073 (71%)321:1086 (70%) | view |
| 571 | x 2 | TFS_2018RTW/Troubleshooting/UtilsTFS_2018Update1/Troubleshooting/Utils | Common.psm1Common.psm1 |
331:1019 (66%)344:1032 (66%) | view |
| 448 | x 2 | Azure_DevOps_Server_2019/Troubleshooting/UtilsTFS_2018Update2/Troubleshooting/Utils | Common.psm1Common.psm1 |
548:1086 (49%)535:1073 (49%) | view |
| 448 | x 2 | Azure_DevOps_Server_2019/Troubleshooting/UtilsTFS_2018Update3/Troubleshooting/Utils | Common.psm1Common.psm1 |
548:1086 (49%)548:1086 (49%) | view |
| 280 | x 2 | Azure_DevOps_Server_2019/Troubleshooting/UtilsTFS_2018Update3/Troubleshooting/Utils | Common.psm1Common.psm1 |
122:457 (30%)122:457 (30%) | view |
| 245 | x 2 | Azure_DevOps_Server_2019TFS_2018Update2 | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
1:289 (100%)1:289 (100%) | view |
| 233 | x 2 | TFS_2018Update2TFS_2018Update3 | ExtensionInstallIndexingStatus.ps1ExtensionInstallIndexingStatus.ps1 |
1:270 (100%)1:270 (100%) | view |
| 233 | x 2 | Azure_DevOps_Server_2019TFS_2018Update3 | ExtensionInstallIndexingStatus.ps1ExtensionInstallIndexingStatus.ps1 |
1:270 (100%)1:270 (100%) | view |
| 233 | x 2 | Azure_DevOps_Server_2019TFS_2018Update2 | ExtensionInstallIndexingStatus.ps1ExtensionInstallIndexingStatus.ps1 |
1:270 (100%)1:270 (100%) | view |
| 232 | x 2 | Azure_DevOps_Server_2019TFS_2018Update3 | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
19:289 (94%)19:289 (94%) | view |
| 232 | x 2 | TFS_2018Update2TFS_2018Update3 | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
19:289 (94%)19:289 (94%) | view |
| 192 | x 2 | TFS_2018Update1/Troubleshooting/UtilsTFS_2018Update2/Troubleshooting/Utils | Common.psm1Common.psm1 |
545:781 (22%)574:810 (21%) | view |
| 192 | x 2 | Azure_DevOps_Server_2019/Troubleshooting/UtilsTFS_2018RTW/Troubleshooting/Utils | Common.psm1Common.psm1 |
587:823 (21%)532:768 (22%) | view |
| 192 | x 2 | Azure_DevOps_Server_2019/Troubleshooting/UtilsTFS_2018Update1/Troubleshooting/Utils | Common.psm1Common.psm1 |
587:823 (21%)545:781 (22%) | view |
| 192 | x 2 | TFS_2018RTW/Troubleshooting/UtilsTFS_2018Update3/Troubleshooting/Utils | Common.psm1Common.psm1 |
532:768 (22%)587:823 (21%) | view |
| 192 | x 2 | TFS_2018Update1/Troubleshooting/UtilsTFS_2018Update3/Troubleshooting/Utils | Common.psm1Common.psm1 |
545:781 (22%)587:823 (21%) | view |
| 192 | x 2 | TFS_2018RTW/Troubleshooting/UtilsTFS_2018Update2/Troubleshooting/Utils | Common.psm1Common.psm1 |
532:768 (22%)574:810 (21%) | view |
| 191 | x 2 | TFS_2017Update2TFS_2018Update1 | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
1:227 (100%)1:227 (100%) | view |
| 191 | x 2 | TFS_2017Update2TFS_2017Update3 | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
1:227 (100%)1:227 (100%) | view |
| 191 | x 2 | TFS_2017Update2TFS_2018RTW | RecentIndexingActivity.ps1RecentIndexingActivity.ps1 |
1:227 (100%)1:227 (100%) | view |