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
- 94% duplication:
- 2,930 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
- 2,777 duplicated lines
- 120 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
cloud-functions-start/public (99%)
--> cloud-functions/public (99%)
918
3 file pairs
details...
performance-monitoring-start/src (98%)
--> web/src (97%)
498
2 file pairs
details...
performance-monitoring/src (94%)
--> web/src (97%)
498
2 file pairs
details...
performance-monitoring-start/src (96%)
--> performance-monitoring/src (93%)
492
2 file pairs
details...
performance-monitoring-start/public (100%)
--> web/public (99%)
482
2 file pairs
details...
cloud-functions/public (52%)
--> web/public (99%)
480
2 file pairs
details...
cloud-functions-start/public (52%)
--> performance-monitoring-start/public (99%)
480
2 file pairs
details...
cloud-functions-start/public (52%)
--> web/public (99%)
480
2 file pairs
details...
cloud-functions/public (52%)
--> performance-monitoring-start/public (99%)
480
2 file pairs
details...
performance-monitoring/public (97%)
--> web/public (99%)
480
2 file pairs
details...
cloud-functions-start/public (51%)
--> web-start/public (99%)
478
2 file pairs
details...
cloud-functions/public (51%)
--> web-start/public (99%)
478
2 file pairs
details...
web-start/public (99%)
--> web/public (98%)
478
2 file pairs
details...
performance-monitoring-start/public (99%)
--> web-start/public (99%)
478
2 file pairs
details...
performance-monitoring-start/public (99%)
--> performance-monitoring/public (97%)
478
2 file pairs
details...
cloud-functions-start/public (51%)
--> performance-monitoring/public (96%)
476
2 file pairs
details...
cloud-functions/public (51%)
--> performance-monitoring/public (96%)
476
2 file pairs
details...
performance-monitoring/public (96%)
--> web-start/public (98%)
474
2 file pairs
details...
web-start/src (78%)
--> web/src (57%)
292
2 file pairs
details...
performance-monitoring/src (55%)
--> web-start/src (78%)
292
2 file pairs
details...
performance-monitoring-start/src (57%)
--> web-start/src (78%)
292
2 file pairs
details...
cloud-functions-start/public (30%)
--> web/src (55%)
282
1 file pair
details...
cloud-functions-start/public (30%)
--> performance-monitoring/src (53%)
282
1 file pair
details...
cloud-functions-start/public (30%)
--> performance-monitoring-start/src (55%)
282
1 file pair
details...
cloud-functions/public (28%)
--> web/src (51%)
264
1 file pair
details...
cloud-functions/public (28%)
--> performance-monitoring-start/src (51%)
264
1 file pair
details...
cloud-functions/public (28%)
--> performance-monitoring/src (50%)
264
1 file pair
details...
cloud-functions-start/public (23%)
--> web-start/src (59%)
220
1 file pair
details...
cloud-functions/public (23%)
--> web-start/src (59%)
220
1 file pair
details...
| From Component --> To Component |
Duplicated Lines |
File Pairs | Details |
|---|---|---|---|
| cloud-functions-start/public (99%) --> cloud-functions/public (99%) |
918 | 3 file pairs | details... |
| performance-monitoring-start/src (98%) --> web/src (97%) |
498 | 2 file pairs | details... |
| performance-monitoring/src (94%) --> web/src (97%) |
498 | 2 file pairs | details... |
| performance-monitoring-start/src (96%) --> performance-monitoring/src (93%) |
492 | 2 file pairs | details... |
| performance-monitoring-start/public (100%) --> web/public (99%) |
482 | 2 file pairs | details... |
| cloud-functions/public (52%) --> web/public (99%) |
480 | 2 file pairs | details... |
| cloud-functions-start/public (52%) --> performance-monitoring-start/public (99%) |
480 | 2 file pairs | details... |
| cloud-functions-start/public (52%) --> web/public (99%) |
480 | 2 file pairs | details... |
| cloud-functions/public (52%) --> performance-monitoring-start/public (99%) |
480 | 2 file pairs | details... |
| performance-monitoring/public (97%) --> web/public (99%) |
480 | 2 file pairs | details... |
| cloud-functions-start/public (51%) --> web-start/public (99%) |
478 | 2 file pairs | details... |
| cloud-functions/public (51%) --> web-start/public (99%) |
478 | 2 file pairs | details... |
| web-start/public (99%) --> web/public (98%) |
478 | 2 file pairs | details... |
| performance-monitoring-start/public (99%) --> web-start/public (99%) |
478 | 2 file pairs | details... |
| performance-monitoring-start/public (99%) --> performance-monitoring/public (97%) |
478 | 2 file pairs | details... |
| cloud-functions-start/public (51%) --> performance-monitoring/public (96%) |
476 | 2 file pairs | details... |
| cloud-functions/public (51%) --> performance-monitoring/public (96%) |
476 | 2 file pairs | details... |
| performance-monitoring/public (96%) --> web-start/public (98%) |
474 | 2 file pairs | details... |
| web-start/src (78%) --> web/src (57%) |
292 | 2 file pairs | details... |
| performance-monitoring/src (55%) --> web-start/src (78%) |
292 | 2 file pairs | details... |
| performance-monitoring-start/src (57%) --> web-start/src (78%) |
292 | 2 file pairs | details... |
| cloud-functions-start/public (30%) --> web/src (55%) |
282 | 1 file pair | details... |
| cloud-functions-start/public (30%) --> performance-monitoring/src (53%) |
282 | 1 file pair | details... |
| cloud-functions-start/public (30%) --> performance-monitoring-start/src (55%) |
282 | 1 file pair | details... |
| cloud-functions/public (28%) --> web/src (51%) |
264 | 1 file pair | details... |
| cloud-functions/public (28%) --> performance-monitoring-start/src (51%) |
264 | 1 file pair | details... |
| cloud-functions/public (28%) --> performance-monitoring/src (50%) |
264 | 1 file pair | details... |
| cloud-functions-start/public (23%) --> web-start/src (59%) |
220 | 1 file pair | details... |
| cloud-functions/public (23%) --> web-start/src (59%) |
220 | 1 file pair | details... |
Longest Duplicates
The list of 20 longest duplicates.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 241 | x 2 | performance-monitoring-start/srcweb/src |  index.jsindex.js |
16:434 (99%)16:423 (98%) | view |
| 185 | x 2 | cloud-functions-start/public/stylesweb-start/public/styles |  main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions-start/public/stylescloud-functions/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions/public/stylesweb/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions-start/public/stylesperformance-monitoring-start/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions-start/public/stylesweb/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | performance-monitoring-start/public/stylesweb/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions/public/stylesweb-start/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions/public/stylesperformance-monitoring-start/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | web-start/public/stylesweb/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | performance-monitoring-start/public/stylesweb-start/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions-start/public/stylesperformance-monitoring/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | performance-monitoring-start/public/stylesperformance-monitoring/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | performance-monitoring/public/stylesweb-start/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | cloud-functions/public/stylesperformance-monitoring/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 185 | x 2 | performance-monitoring/public/stylesweb/public/styles | main.cssmain.css |
17:201 (100%)17:201 (100%) | view |
| 181 | x 2 | cloud-functions-start/public/scriptscloud-functions/public/scripts | main.jsmain.js |
78:384 (84%)78:384 (84%) | view |
| 170 | x 2 | performance-monitoring/srcweb/src | index.jsindex.js |
161:449 (67%)141:426 (69%) | view |
| 167 | x 2 | performance-monitoring-start/srcperformance-monitoring/src | index.jsindex.js |
152:434 (68%)161:443 (66%) | view |
| 111 | x 2 | cloud-functions-start/public/scriptsweb/src | main.jsindex.js |
140:334 (52%)195:389 (45%) | view |
Duplicated Units
The list of top 20 duplicated units.
| Size | # | Folders | Files | Lines | Code |
|---|---|---|---|---|---|
| 27 | x 6 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/srcweb-start/src | main.jsindex.jsmain.jsindex.jsindex.jsindex.js |
257:295 323:361 257:295 332:370 312:350 228:266 | view |
| 22 | x 5 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/src | main.jsindex.jsmain.jsindex.jsindex.js |
298:326 364:392 298:326 373:401 353:381 | view |
| 19 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
165:189 174:198 154:178 | view |
| 17 | x 5 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/src | main.jsindex.jsmain.jsindex.jsindex.js |
176:205 242:271 176:205 251:280 231:260 | view |
| 15 | x 5 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/src | main.jsindex.jsmain.jsindex.jsindex.js |
140:160 206:226 140:160 215:235 195:215 | view |
| 13 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
94:112 98:116 93:111 | view |
| 12 | x 2 | cloud-functions-start/public/scriptscloud-functions/public/scripts | main.jsmain.js |
112:126 112:126 | view |
| 19 | x 2 | cloud-functions-start/public/scriptscloud-functions/public/scripts | main.jsmain.js |
86:109 86:109 | view |
| 11 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
96:112 100:116 95:111 | view |
| 10 | x 5 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/src | main.jsindex.jsmain.jsindex.jsindex.js |
208:221 274:287 208:221 283:296 263:276 | view |
| 10 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
97:112 101:116 96:111 | view |
| 10 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
111:121 115:125 110:120 | view |
| 9 | x 2 | performance-monitoring-start/srcweb/src | index.jsindex.js |
130:155 129:144 | view |
| 9 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
192:203 201:212 181:192 | view |
| 7 | x 2 | cloud-functions-start/public/scriptscloud-functions/public/scripts | main.jsmain.js |
129:137 129:137 | view |
| 7 | x 4 | performance-monitoring-start/srcperformance-monitoring/srcweb/srcweb-start/src | firebase-config.jsfirebase-config.jsfirebase-config.jsfirebase-config.js |
13:20 13:20 13:20 13:20 | view |
| 7 | x 2 | performance-monitoring-start/srcweb/src | index.jsindex.js |
132:155 131:144 | view |
| 6 | x 6 | cloud-functions-start/public/scriptsperformance-monitoring-start/srccloud-functions/public/scriptsperformance-monitoring/srcweb/srcweb-start/src | main.jsindex.jsmain.jsindex.jsindex.jsindex.js |
330:336 396:402 330:336 405:411 385:391 307:313 | view |
| 6 | x 2 | cloud-functions-start/public/scriptscloud-functions/public/scripts | main.jsmain.js |
339:345 339:345 | view |
| 12 | x 3 | performance-monitoring-start/srcperformance-monitoring/srcweb/src | index.jsindex.jsindex.js |
90:103 94:107 89:102 | view |