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
- 42% duplication:
- 56,122 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 23,622 duplicated lines
- 19,416 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 (64%)
--> functions (82%)
4164
26 file pairs
details...
analytics (80%)
--> crashlytics (64%)
4122
26 file pairs
details...
crashlytics (61%)
--> dynamic_links (71%)
3974
25 file pairs
details...
analytics (77%)
--> dynamic_links (71%)
3962
25 file pairs
details...
dynamic_links (70%)
--> functions (78%)
3938
25 file pairs
details...
analytics (76%)
--> functions (77%)
3910
25 file pairs
details...
auth (44%)
--> database (38%)
3896
25 file pairs
details...
crashlytics (60%)
--> database (37%)
3890
25 file pairs
details...
database (37%)
--> functions (77%)
3880
25 file pairs
details...
auth (44%)
--> functions (76%)
3870
25 file pairs
details...
firestore (18%)
--> functions (76%)
3850
21 file pairs
details...
database (37%)
--> dynamic_links (69%)
3850
25 file pairs
details...
auth (43%)
--> crashlytics (59%)
3844
25 file pairs
details...
analytics (75%)
--> database (37%)
3842
25 file pairs
details...
auth (43%)
--> dynamic_links (68%)
3834
25 file pairs
details...
analytics (75%)
--> auth (43%)
3830
25 file pairs
details...
dynamic_links (68%)
--> firestore (18%)
3798
21 file pairs
details...
analytics (74%)
--> firestore (18%)
3778
21 file pairs
details...
crashlytics (58%)
--> firestore (18%)
3776
21 file pairs
details...
auth (42%)
--> firestore (17%)
3718
21 file pairs
details...
database (36%)
--> firestore (17%)
3716
21 file pairs
details...
installations (77%)
--> remote_config (74%)
3563
26 file pairs
details...
installations (76%)
--> storage (39%)
3540
25 file pairs
details...
remote_config (72%)
--> storage (38%)
3480
25 file pairs
details...
messaging (56%)
--> remote_config (71%)
3410
26 file pairs
details...
installations (73%)
--> messaging (55%)
3388
26 file pairs
details...
messaging (55%)
--> storage (37%)
3350
25 file pairs
details...
firestore (14%)
--> storage (34%)
3120
22 file pairs
details...
crashlytics (46%)
--> installations (64%)
2998
26 file pairs
details...
analytics (58%)
--> installations (64%)
2990
26 file pairs
details...
functions (59%)
--> storage (33%)
2970
25 file pairs
details...
dynamic_links (53%)
--> installations (63%)
2958
25 file pairs
details...
database (28%)
--> storage (32%)
2952
26 file pairs
details...
auth (33%)
--> installations (63%)
2926
25 file pairs
details...
analytics (57%)
--> remote_config (61%)
2920
26 file pairs
details...
auth (33%)
--> remote_config (61%)
2916
25 file pairs
details...
functions (57%)
--> installations (63%)
2916
25 file pairs
details...
crashlytics (45%)
--> remote_config (60%)
2914
25 file pairs
details...
database (28%)
--> installations (62%)
2908
25 file pairs
details...
crashlytics (45%)
--> storage (32%)
2902
25 file pairs
details...
dynamic_links (52%)
--> storage (32%)
2900
25 file pairs
details...
dynamic_links (52%)
--> remote_config (60%)
2898
25 file pairs
details...
auth (33%)
--> storage (32%)
2896
25 file pairs
details...
functions (57%)
--> remote_config (60%)
2892
25 file pairs
details...
analytics (56%)
--> storage (32%)
2878
25 file pairs
details...
database (28%)
--> remote_config (60%)
2874
25 file pairs
details...
auth (32%)
--> messaging (46%)
2844
25 file pairs
details...
analytics (54%)
--> messaging (45%)
2796
26 file pairs
details...
functions (55%)
--> messaging (45%)
2778
25 file pairs
details...
dynamic_links (49%)
--> messaging (45%)
2776
25 file pairs
details...
crashlytics (43%)
--> messaging (45%)
2776
25 file pairs
details...
database (27%)
--> messaging (45%)
2772
25 file pairs
details...
firestore (13%)
--> installations (59%)
2764
21 file pairs
details...
firestore (13%)
--> remote_config (57%)
2738
21 file pairs
details...
firestore (12%)
--> messaging (43%)
2656
21 file pairs
details...
crashlytics (3%)
--> scripts (3%)
251
2 file pairs
details...
installations (5%)
--> scripts (3%)
249
2 file pairs
details...
remote_config (5%)
--> scripts (3%)
249
2 file pairs
details...
functions (4%)
--> scripts (3%)
249
2 file pairs
details...
database (2%)
--> scripts (3%)
249
2 file pairs
details...
auth (2%)
--> scripts (3%)
249
2 file pairs
details...
dynamic_links (4%)
--> scripts (3%)
249
2 file pairs
details...
scripts (3%)
--> storage (2%)
249
2 file pairs
details...
messaging (4%)
--> scripts (3%)
249
2 file pairs
details...
firestore (1%)
--> scripts (3%)
249
2 file pairs
details...
analytics (4%)
--> scripts (3%)
240
2 file pairs
details...
app (1%)
--> testapp (15%)
72
3 file pairs
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| crashlytics (64%) --> functions (82%) |
4164 | 26 file pairs | details... |
| analytics (80%) --> crashlytics (64%) |
4122 | 26 file pairs | details... |
| crashlytics (61%) --> dynamic_links (71%) |
3974 | 25 file pairs | details... |
| analytics (77%) --> dynamic_links (71%) |
3962 | 25 file pairs | details... |
| dynamic_links (70%) --> functions (78%) |
3938 | 25 file pairs | details... |
| analytics (76%) --> functions (77%) |
3910 | 25 file pairs | details... |
| auth (44%) --> database (38%) |
3896 | 25 file pairs | details... |
| crashlytics (60%) --> database (37%) |
3890 | 25 file pairs | details... |
| database (37%) --> functions (77%) |
3880 | 25 file pairs | details... |
| auth (44%) --> functions (76%) |
3870 | 25 file pairs | details... |
| firestore (18%) --> functions (76%) |
3850 | 21 file pairs | details... |
| database (37%) --> dynamic_links (69%) |
3850 | 25 file pairs | details... |
| auth (43%) --> crashlytics (59%) |
3844 | 25 file pairs | details... |
| analytics (75%) --> database (37%) |
3842 | 25 file pairs | details... |
| auth (43%) --> dynamic_links (68%) |
3834 | 25 file pairs | details... |
| analytics (75%) --> auth (43%) |
3830 | 25 file pairs | details... |
| dynamic_links (68%) --> firestore (18%) |
3798 | 21 file pairs | details... |
| analytics (74%) --> firestore (18%) |
3778 | 21 file pairs | details... |
| crashlytics (58%) --> firestore (18%) |
3776 | 21 file pairs | details... |
| auth (42%) --> firestore (17%) |
3718 | 21 file pairs | details... |
| database (36%) --> firestore (17%) |
3716 | 21 file pairs | details... |
| installations (77%) --> remote_config (74%) |
3563 | 26 file pairs | details... |
| installations (76%) --> storage (39%) |
3540 | 25 file pairs | details... |
| remote_config (72%) --> storage (38%) |
3480 | 25 file pairs | details... |
| messaging (56%) --> remote_config (71%) |
3410 | 26 file pairs | details... |
| installations (73%) --> messaging (55%) |
3388 | 26 file pairs | details... |
| messaging (55%) --> storage (37%) |
3350 | 25 file pairs | details... |
| firestore (14%) --> storage (34%) |
3120 | 22 file pairs | details... |
| crashlytics (46%) --> installations (64%) |
2998 | 26 file pairs | details... |
| analytics (58%) --> installations (64%) |
2990 | 26 file pairs | details... |
| functions (59%) --> storage (33%) |
2970 | 25 file pairs | details... |
| dynamic_links (53%) --> installations (63%) |
2958 | 25 file pairs | details... |
| database (28%) --> storage (32%) |
2952 | 26 file pairs | details... |
| auth (33%) --> installations (63%) |
2926 | 25 file pairs | details... |
| analytics (57%) --> remote_config (61%) |
2920 | 26 file pairs | details... |
| auth (33%) --> remote_config (61%) |
2916 | 25 file pairs | details... |
| functions (57%) --> installations (63%) |
2916 | 25 file pairs | details... |
| crashlytics (45%) --> remote_config (60%) |
2914 | 25 file pairs | details... |
| database (28%) --> installations (62%) |
2908 | 25 file pairs | details... |
| crashlytics (45%) --> storage (32%) |
2902 | 25 file pairs | details... |
| dynamic_links (52%) --> storage (32%) |
2900 | 25 file pairs | details... |
| dynamic_links (52%) --> remote_config (60%) |
2898 | 25 file pairs | details... |
| auth (33%) --> storage (32%) |
2896 | 25 file pairs | details... |
| functions (57%) --> remote_config (60%) |
2892 | 25 file pairs | details... |
| analytics (56%) --> storage (32%) |
2878 | 25 file pairs | details... |
| database (28%) --> remote_config (60%) |
2874 | 25 file pairs | details... |
| auth (32%) --> messaging (46%) |
2844 | 25 file pairs | details... |
| analytics (54%) --> messaging (45%) |
2796 | 26 file pairs | details... |
| functions (55%) --> messaging (45%) |
2778 | 25 file pairs | details... |
| dynamic_links (49%) --> messaging (45%) |
2776 | 25 file pairs | details... |
| crashlytics (43%) --> messaging (45%) |
2776 | 25 file pairs | details... |
| database (27%) --> messaging (45%) |
2772 | 25 file pairs | details... |
| firestore (13%) --> installations (59%) |
2764 | 21 file pairs | details... |
| firestore (13%) --> remote_config (57%) |
2738 | 21 file pairs | details... |
| firestore (12%) --> messaging (43%) |
2656 | 21 file pairs | details... |
| crashlytics (3%) --> scripts (3%) |
251 | 2 file pairs | details... |
| installations (5%) --> scripts (3%) |
249 | 2 file pairs | details... |
| remote_config (5%) --> scripts (3%) |
249 | 2 file pairs | details... |
| functions (4%) --> scripts (3%) |
249 | 2 file pairs | details... |
| database (2%) --> scripts (3%) |
249 | 2 file pairs | details... |
| auth (2%) --> scripts (3%) |
249 | 2 file pairs | details... |
| dynamic_links (4%) --> scripts (3%) |
249 | 2 file pairs | details... |
| scripts (3%) --> storage (2%) |
249 | 2 file pairs | details... |
| messaging (4%) --> scripts (3%) |
249 | 2 file pairs | details... |
| firestore (1%) --> scripts (3%) |
249 | 2 file pairs | details... |
| analytics (4%) --> scripts (3%) |
240 | 2 file pairs | details... |
| app (1%) --> testapp (15%) |
72 | 3 file pairs | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 600 | x 2 | firestore/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
167:766 (78%)167:766 (78%) | view |
| 600 | x 2 | crashlytics/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
167:766 (78%)167:766 (78%) | view |
| 600 | x 2 | crashlytics/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
167:766 (78%)167:766 (78%) | view |
| 595 | x 2 | analytics/testapp/ProjectSettingscrashlytics/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
169:763 (77%)172:766 (77%) | view |
| 595 | x 2 | analytics/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
169:763 (77%)172:766 (77%) | view |
| 595 | x 2 | analytics/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
169:763 (77%)172:766 (77%) | view |
| 568 | x 2 | auth/testapp/ProjectSettingsdatabase/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
167:734 (77%)167:734 (77%) | view |
| 467 | x 2 | installations/testapp/ProjectSettingsstorage/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
121:587 (79%)121:587 (79%) | view |
| 457 | x 2 | dynamic_links/testapp/ProjectSettingsfunctions/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
313:769 (59%)310:766 (59%) | view |
| 457 | x 2 | crashlytics/testapp/ProjectSettingsdynamic_links/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
310:766 (59%)313:769 (59%) | view |
| 457 | x 2 | dynamic_links/testapp/ProjectSettingsfirestore/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
313:769 (59%)310:766 (59%) | view |
| 457 | x 2 | analytics/testapp/ProjectSettingsdynamic_links/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
307:763 (59%)313:769 (59%) | view |
| 359 | x 2 | installations/testapp/ProjectSettingsremote_config/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
229:587 (61%)203:561 (63%) | view |
| 359 | x 2 | remote_config/testapp/ProjectSettingsstorage/testapp/ProjectSettings | asset ProjectSettings.assetProjectSettings.asset |
203:561 (63%)229:587 (61%) | 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 20 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 3 | remote_config/testapp/As...ase/Sample/RemoteConfigfirestore/testapp/Assets/Firebase/Sample/Firestoreauth/testapp/Assets/Firebase/Sample/Auth | UIHandler.csUIHandler.csUIHandler.cs |
218:244 577:604 915:941 | 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 |
| 18 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storage | UIHandlerAutomated.csUIHandlerAutomated.cs |
3890:3908 1145:1163 | view |
| 15 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorefirestore/testapp/Assets/Firebase/Sample/Firestore | UIHandler.csUIHandlerAutomated.cs |
64:79 425:440 | view |
| 15 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storage | UIHandlerAutomated.csUIHandlerAutomated.cs |
3918:3933 1173:1188 | 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 |
120:130 38:48 41:51 39:49 41:51 53:63 | view |
| 10 | x 2 | storage/src/internalstorage/src/internal | Preconditions.csPreconditions.cs |
217:228 264:275 | view |
| 9 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorefirestore/testapp/Assets/Firebase/Sample/Firestore | UIHandler.csUIHandlerAutomated.cs |
103:115 468:480 | view |
| 9 | x 2 | crashlytics/testapp/Asse...base/Sample/Crashlyticsanalytics/testapp/Assets/Firebase/Sample/Analytics | UIHandlerAutomated.csUIHandlerAutomated.cs |
64:73 13:22 | 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 2 | firestore/testapp/Assets/Firebase/Sample/Firestorefirestore/testapp/Assets/Firebase/Sample/Firestore | InvalidArgumentsTest.csInvalidArgumentsTest.cs |
1103:1111 1160:1168 | 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 |
147:157 113:123 143:152 71:81 109:119 | view |
| 8 | x 2 | firestore/testapp/Assets/Firebase/Sample/Firestorestorage/testapp/Assets/Firebase/Sample/Storage | UIHandler.csUIHandler.cs |
509:517 488:496 | view |
| 8 | x 2 | firestore/src/swigfirestore/src/swig |  transaction_manager.cctransaction_manager.cc |
105:113 115:123 | view |
| 8 | x 2 | storage/testapp/Assets/Firebase/Sample/Storagedatabase/testapp/Assets/Firebase/Sample/Database | UIHandlerAutomated.csUIHandlerAutomated.cs |
237:245 241:249 | view |