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
- 87% duplication:
- 21,417 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 18,834 duplicated lines
- 16,977 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
crashlytics (94%)
--> functions (93%)
3666
18 file pairs
details...
analytics (93%)
--> crashlytics (91%)
3520
17 file pairs
details...
crashlytics (90%)
--> dynamic_links (90%)
3502
17 file pairs
details...
firestore (72%)
--> functions (89%)
3498
17 file pairs
details...
analytics (92%)
--> dynamic_links (90%)
3498
17 file pairs
details...
dynamic_links (89%)
--> functions (88%)
3456
17 file pairs
details...
dynamic_links (89%)
--> firestore (71%)
3450
17 file pairs
details...
analytics (91%)
--> functions (88%)
3446
17 file pairs
details...
analytics (90%)
--> firestore (70%)
3440
17 file pairs
details...
crashlytics (88%)
--> firestore (70%)
3428
17 file pairs
details...
auth (72%)
--> database (89%)
3406
17 file pairs
details...
crashlytics (87%)
--> database (89%)
3390
17 file pairs
details...
auth (71%)
--> functions (86%)
3380
17 file pairs
details...
database (88%)
--> functions (86%)
3378
17 file pairs
details...
analytics (89%)
--> database (88%)
3378
17 file pairs
details...
auth (71%)
--> firestore (69%)
3370
17 file pairs
details...
database (88%)
--> dynamic_links (87%)
3368
17 file pairs
details...
analytics (88%)
--> auth (71%)
3366
17 file pairs
details...
database (88%)
--> firestore (69%)
3364
17 file pairs
details...
auth (71%)
--> crashlytics (86%)
3360
17 file pairs
details...
auth (71%)
--> dynamic_links (86%)
3356
17 file pairs
details...
installations (90%)
--> storage (77%)
3062
18 file pairs
details...
installations (90%)
--> remote_config (90%)
3054
18 file pairs
details...
remote_config (88%)
--> storage (75%)
3002
18 file pairs
details...
messaging (88%)
--> remote_config (87%)
2938
18 file pairs
details...
installations (86%)
--> messaging (87%)
2920
18 file pairs
details...
messaging (86%)
--> storage (72%)
2894
18 file pairs
details...
firestore (54%)
--> storage (65%)
2620
17 file pairs
details...
crashlytics (64%)
--> installations (73%)
2492
17 file pairs
details...
analytics (65%)
--> installations (73%)
2488
17 file pairs
details...
dynamic_links (64%)
--> installations (73%)
2472
17 file pairs
details...
functions (62%)
--> storage (61%)
2436
17 file pairs
details...
analytics (64%)
--> remote_config (71%)
2426
17 file pairs
details...
crashlytics (62%)
--> remote_config (71%)
2420
17 file pairs
details...
auth (51%)
--> remote_config (71%)
2418
17 file pairs
details...
functions (61%)
--> installations (71%)
2418
17 file pairs
details...
dynamic_links (62%)
--> remote_config (71%)
2412
17 file pairs
details...
database (63%)
--> installations (71%)
2410
17 file pairs
details...
auth (50%)
--> installations (71%)
2410
17 file pairs
details...
dynamic_links (62%)
--> storage (60%)
2408
17 file pairs
details...
firestore (49%)
--> installations (71%)
2408
17 file pairs
details...
analytics (63%)
--> storage (60%)
2396
17 file pairs
details...
functions (61%)
--> remote_config (70%)
2394
17 file pairs
details...
auth (50%)
--> storage (60%)
2392
17 file pairs
details...
crashlytics (61%)
--> storage (60%)
2390
17 file pairs
details...
database (62%)
--> storage (60%)
2386
17 file pairs
details...
firestore (49%)
--> remote_config (70%)
2382
17 file pairs
details...
database (62%)
--> remote_config (70%)
2376
17 file pairs
details...
auth (49%)
--> messaging (70%)
2344
17 file pairs
details...
crashlytics (59%)
--> messaging (69%)
2300
17 file pairs
details...
analytics (60%)
--> messaging (69%)
2300
17 file pairs
details...
firestore (47%)
--> messaging (68%)
2296
17 file pairs
details...
functions (58%)
--> messaging (68%)
2296
17 file pairs
details...
dynamic_links (59%)
--> messaging (68%)
2294
17 file pairs
details...
database (60%)
--> messaging (68%)
2290
17 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| crashlytics (94%) --> functions (93%) |
3666 | 18 file pairs | details... |
| analytics (93%) --> crashlytics (91%) |
3520 | 17 file pairs | details... |
| crashlytics (90%) --> dynamic_links (90%) |
3502 | 17 file pairs | details... |
| firestore (72%) --> functions (89%) |
3498 | 17 file pairs | details... |
| analytics (92%) --> dynamic_links (90%) |
3498 | 17 file pairs | details... |
| dynamic_links (89%) --> functions (88%) |
3456 | 17 file pairs | details... |
| dynamic_links (89%) --> firestore (71%) |
3450 | 17 file pairs | details... |
| analytics (91%) --> functions (88%) |
3446 | 17 file pairs | details... |
| analytics (90%) --> firestore (70%) |
3440 | 17 file pairs | details... |
| crashlytics (88%) --> firestore (70%) |
3428 | 17 file pairs | details... |
| auth (72%) --> database (89%) |
3406 | 17 file pairs | details... |
| crashlytics (87%) --> database (89%) |
3390 | 17 file pairs | details... |
| auth (71%) --> functions (86%) |
3380 | 17 file pairs | details... |
| database (88%) --> functions (86%) |
3378 | 17 file pairs | details... |
| analytics (89%) --> database (88%) |
3378 | 17 file pairs | details... |
| auth (71%) --> firestore (69%) |
3370 | 17 file pairs | details... |
| database (88%) --> dynamic_links (87%) |
3368 | 17 file pairs | details... |
| analytics (88%) --> auth (71%) |
3366 | 17 file pairs | details... |
| database (88%) --> firestore (69%) |
3364 | 17 file pairs | details... |
| auth (71%) --> crashlytics (86%) |
3360 | 17 file pairs | details... |
| auth (71%) --> dynamic_links (86%) |
3356 | 17 file pairs | details... |
| installations (90%) --> storage (77%) |
3062 | 18 file pairs | details... |
| installations (90%) --> remote_config (90%) |
3054 | 18 file pairs | details... |
| remote_config (88%) --> storage (75%) |
3002 | 18 file pairs | details... |
| messaging (88%) --> remote_config (87%) |
2938 | 18 file pairs | details... |
| installations (86%) --> messaging (87%) |
2920 | 18 file pairs | details... |
| messaging (86%) --> storage (72%) |
2894 | 18 file pairs | details... |
| firestore (54%) --> storage (65%) |
2620 | 17 file pairs | details... |
| crashlytics (64%) --> installations (73%) |
2492 | 17 file pairs | details... |
| analytics (65%) --> installations (73%) |
2488 | 17 file pairs | details... |
| dynamic_links (64%) --> installations (73%) |
2472 | 17 file pairs | details... |
| functions (62%) --> storage (61%) |
2436 | 17 file pairs | details... |
| analytics (64%) --> remote_config (71%) |
2426 | 17 file pairs | details... |
| crashlytics (62%) --> remote_config (71%) |
2420 | 17 file pairs | details... |
| auth (51%) --> remote_config (71%) |
2418 | 17 file pairs | details... |
| functions (61%) --> installations (71%) |
2418 | 17 file pairs | details... |
| dynamic_links (62%) --> remote_config (71%) |
2412 | 17 file pairs | details... |
| database (63%) --> installations (71%) |
2410 | 17 file pairs | details... |
| auth (50%) --> installations (71%) |
2410 | 17 file pairs | details... |
| dynamic_links (62%) --> storage (60%) |
2408 | 17 file pairs | details... |
| firestore (49%) --> installations (71%) |
2408 | 17 file pairs | details... |
| analytics (63%) --> storage (60%) |
2396 | 17 file pairs | details... |
| functions (61%) --> remote_config (70%) |
2394 | 17 file pairs | details... |
| auth (50%) --> storage (60%) |
2392 | 17 file pairs | details... |
| crashlytics (61%) --> storage (60%) |
2390 | 17 file pairs | details... |
| database (62%) --> storage (60%) |
2386 | 17 file pairs | details... |
| firestore (49%) --> remote_config (70%) |
2382 | 17 file pairs | details... |
| database (62%) --> remote_config (70%) |
2376 | 17 file pairs | details... |
| auth (49%) --> messaging (70%) |
2344 | 17 file pairs | details... |
| crashlytics (59%) --> messaging (69%) |
2300 | 17 file pairs | details... |
| analytics (60%) --> messaging (69%) |
2300 | 17 file pairs | details... |
| firestore (47%) --> messaging (68%) |
2296 | 17 file pairs | details... |
| functions (58%) --> messaging (68%) |
2296 | 17 file pairs | details... |
| dynamic_links (59%) --> messaging (68%) |
2294 | 17 file pairs | details... |
| database (60%) --> messaging (68%) |
2290 | 17 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 597 | x 2 | analytics/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 597 | x 2 | analytics/testapp/ProjectSettingscrashlytics/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 597 | x 2 | crashlytics/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 597 | x 2 | firestore/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 597 | x 2 | analytics/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 597 | x 2 | crashlytics/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:762 (78%)166:762 (78%) | view |
| 565 | x 2 | auth/testapp/ProjectSettingsdatabase/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
166:730 (77%)166:730 (77%) | view |
| 467 | x 2 | installations/testapp/ProjectSettingsstorage/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
109:575 (81%)109:575 (81%) | view |
| 457 | x 2 | dynamic_links/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
309:765 (59%)306:762 (59%) | view |
| 457 | x 2 | crashlytics/testapp/ProjectSettingsdynamic_links/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
306:762 (59%)309:765 (59%) | view |
| 457 | x 2 | analytics/testapp/ProjectSettingsdynamic_links/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
306:762 (59%)309:765 (59%) | view |
| 457 | x 2 | dynamic_links/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
309:765 (59%)306:762 (59%) | view |
| 359 | x 2 | installations/testapp/ProjectSettingsremote_config/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
217:575 (62%)191:549 (65%) | view |
| 359 | x 2 | remote_config/testapp/ProjectSettingsstorage/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
191:549 (65%)217:575 (62%) | view |
| 295 | x 2 | auth/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
| 295 | x 2 | crashlytics/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
| 295 | x 2 | auth/testapp/ProjectSettingscrashlytics/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
| 295 | x 2 | messaging/testapp/ProjectSettingsremote_config/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
| 295 | x 2 | auth/testapp/ProjectSettingsdynamic_links/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
| 295 | x 2 | installations/testapp/ProjectSettingsmessaging/testapp/ProjectSettings | asset InputManager.assetInputManager.asset |
1:295 (100%)1:295 (100%) | view |
Duplicated Units
The list of top 12 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 28 | x 2 | crashlytics/testapp/Asse...base/Sample/Crashlyticsfunctions/testapp/Assets/Firebase/Sample/Functions |  Utils.csUtils.cs |
33:61 33:61 | view |
| 21 | x 2 | remote_config/testapp/As...ase/Sample/RemoteConfigauth/testapp/Assets/Firebase/Sample/Auth | UIHandler.csUIHandler.cs |
218:244 915:941 | view |
| 21 | x 3 | installations/testapp/As...se/Sample/Installationsanalytics/testapp/Assets/Firebase/Sample/Analyticsdynamic_links/testapp/As...ase/Sample/DynamicLinks | UIHandler.csUIHandler.csUIHandler.cs |
177:203 199:225 232:258 | view |
| 19 | x 2 | crashlytics/testapp/Asse...base/Sample/Crashlyticsfunctions/testapp/Assets/Firebase/Sample/Functions | Utils.csUtils.cs |
65:84 65:84 | view |
| 12 | x 2 | crashlytics/testapp/Asse...base/Sample/Crashlyticsfunctions/testapp/Assets/Firebase/Sample/Functions | Utils.csUtils.cs |
88:100 88:100 | view |
| 12 | x 2 | crashlytics/testapp/Asse...base/Sample/Crashlyticsfunctions/testapp/Assets/Firebase/Sample/Functions | Utils.csUtils.cs |
104:116 104:116 | view |
| 10 | x 3 | remote_config/testapp/As...ase/Sample/RemoteConfigauth/testapp/Assets/Firebase/Sample/Authmessaging/testapp/Assets/Firebase/Sample/Messaging | UIHandler.csUIHandler.csUIHandler.cs |
38:48 79:89 64:74 | view |
| 10 | x 6 | firestore/testapp/Assets/Firebase/Sample/Firestorecrashlytics/testapp/Asse...base/Sample/Crashlyticsinstallations/testapp/As...se/Sample/Installationsanalytics/testapp/Assets/Firebase/Sample/Analyticsfunctions/testapp/Assets/Firebase/Sample/Functionsdynamic_links/testapp/As...ase/Sample/DynamicLinks | UIHandler.csUIHandler.csUIHandler.csUIHandler.csUIHandler.csUIHandler.cs |
64:74 38:48 41:51 39:49 41:51 53:63 | view |
| 8 | x 6 | remote_config/testapp/As...ase/Sample/RemoteConfigcrashlytics/testapp/Asse...base/Sample/Crashlyticsmessaging/testapp/Assets/Firebase/Sample/Messaginginstallations/testapp/As...se/Sample/Installationsanalytics/testapp/Assets/Firebase/Sample/Analyticsdynamic_links/testapp/As...ase/Sample/DynamicLinks | UIHandler.csUIHandler.csUIHandler.csUIHandler.csUIHandler.csUIHandler.cs |
170:180 103:113 146:156 128:138 138:148 90:100 | view |
| 8 | x 5 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storageauth/testapp/Assets/Firebase/Sample/Authfunctions/testapp/Assets/Firebase/Sample/Functionsdatabase/testapp/Assets/Firebase/Sample/Database | UIHandler.csUIHandler.csUIHandler.csUIHandler.csUIHandler.cs |
91:101 113:123 143:152 71:81 109:119 | view |
| 8 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storage | UIHandler.csUIHandler.cs |
247:255 488:496 | view |
| 6 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storage | UIHandler.csUIHandler.cs |
153:159 194:200 | view |