mozilla / perf-youtube-playback

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.

Learn more...

Duplication Overall

70% duplication:

25,395 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
17,870 duplicated lines

647 duplicates

dependency graphs: 2D graph | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Duplication Between Components (50+ lines)

Download: SVG DOT (open online Graphviz editor)

From Component --> To Component	Duplicated Lines	File Pairs	Details
2019 (77%) --> 2020 (60%)	17180	85 file pairs	details...

Open 2D force graph... Open 3D force graph...

Show more details on duplication between components...

Longest Duplicates

The list of 50 longest duplicates.

See data for all 647 duplicates...

Size	#	Folders	Files	Lines	Code
467	x 2	2019/manual 2020/manual	manual-page-style.css manual-page-style.css	18:578 (94%) 18:578 (92%)	view
437	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	81:711 (77%) 81:711 (77%)	view
399	x 2	2019 2020	changelog.html changelog.html	47:557 (94%) 84:594 (88%)	view
236	x 2	2019/harness 2020/harness	focusManager.js focusManager.js	18:314 (100%) 18:314 (100%)	view
199	x 2	2019/lib/parsers 2020/lib/parsers	webm.js webm.js	19:436 (100%) 19:436 (100%)	view
172	x 2	2019/lib/eme 2020/lib/eme	encryptedMediaPortability.js encryptedMediaPortability.js	18:316 (100%) 18:316 (100%)	view
171	x 2	2019/lib/functional 2020/lib/functional	mediaSourceSetup.js mediaSourceSetup.js	18:272 (100%) 18:272 (100%)	view
164	x 2	2019/lib/streams 2020/lib/streams	mediaStreams.js mediaStreams.js	295:481 (22%) 378:564 (13%)	view
162	x 2	2019 2020	style.css style.css	18:206 (66%) 18:206 (61%)	view
145	x 2	2019/harness 2020/harness	util.js util.js	48:229 (53%) 137:317 (37%)	view
130	x 2	2019/harness 2020/harness	compactTestList.js compactTestList.js	58:222 (81%) 59:223 (80%)	view
126	x 2	2019/lib/eme 2020/lib/eme	licenseManager.js licenseManager.js	18:189 (100%) 18:189 (97%)	view
123	x 2	2019 2020	changelog.css changelog.css	18:164 (100%) 18:164 (100%)	view
117	x 2	2019/harness 2020/harness	xhr.js xhr.js	18:170 (100%) 18:170 (100%)	view
104	x 2	2019/harness 2020/harness	key.js key.js	18:135 (100%) 18:135 (100%)	view
101	x 2	2019/lib/streams 2020/lib/streams	mediaStreams.js mediaStreams.js	659:759 (14%) 801:901 (8%)	view
94	x 2	2019/lib/streams 2020/lib/streams	mediaStreams.js mediaStreams.js	95:196 (13%) 141:242 (7%)	view
84	x 2	2019/lib/manual 2020/lib/manual	cookie.js cookie.js	18:112 (100%) 18:112 (100%)	view
81	x 2	2019/harness 2020/harness	main.js main.js	56:157 (56%) 66:167 (50%)	view
69	x 2	2019/lib/streams 2020/lib/streams	mediaStreams.js mediaStreams.js	482:555 (9%) 581:654 (5%)	view
69	x 2	2019/harness 2020/harness	testView.js testView.js	94:179 (49%) 107:192 (43%)	view
66	x 2	2019/lib/manual 2020/lib/manual	dual_video.js dual_video.js	43:119 (78%) 55:131 (70%)	view
66	x 2	2019/lib/manual 2020/lib/manual	web_audio.js web_audio.js	18:114 (100%) 18:114 (100%)	view
64	x 2	2019/lib/parsers 2020/lib/parsers	mp4.js mp4.js	19:105 (100%) 19:105 (100%)	view
63	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	1148:1232 (6%) 1681:1765 (4%)	view
62	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	845:921 (3%) 199:275 (4%)	view
62	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	619:687 (3%) 842:910 (7%)	view
55	x 2	2019 2020	style.css style.css	206:274 (22%) 230:298 (20%)	view
52	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	927:987 (3%) 285:345 (3%)	view
50	x 2	2019/harness 2020/harness	testTypes.js testTypes.js	47:100 (51%) 77:130 (37%)	view
50	x 2	2019/harness 2020/harness	timeout.js timeout.js	18:78 (100%) 18:78 (100%)	view
50	x 2	2019/lib/manual 2020/lib/manual	key_event.js key_event.js	19:89 (100%) 19:89 (100%)	view
49	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	381:436 (2%) 388:443 (5%)	view
49	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1225:1274 (2%) 714:763 (3%)	view
49	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1661:1711 (2%) 1187:1237 (3%)	view
48	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	1922:1976 (2%) 966:1020 (5%)	view
46	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1073:1120 (2%) 443:490 (3%)	view
46	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1284:1334 (2%) 777:827 (3%)	view
46	x 2	2019/harness 2020/harness	eventListener.js eventListener.js	18:77 (100%) 18:77 (100%)	view
45	x 2	2020/manual 2020/manual	mtm1080.html mtm720.html	1:70 (84%) 1:70 (84%)	view
45	x 2	2020/manual 2020/manual	mtm1080.html mtm2160.html	1:70 (84%) 1:70 (84%)	view
45	x 2	2020/manual 2020/manual	mtm1440.html mtm720.html	1:70 (84%) 1:70 (84%)	view
45	x 2	2020/manual 2020/manual	mtm1440.html mtm2160.html	1:70 (84%) 1:70 (84%)	view
45	x 2	2020/manual 2020/manual	mtm1080.html mtm1440.html	1:70 (84%) 1:70 (84%)	view
45	x 2	2020/manual 2020/manual	mtm2160.html mtm720.html	1:70 (84%) 1:70 (84%)	view
44	x 2	2019/harness 2020/harness	testView.js testView.js	18:74 (31%) 18:74 (28%)	view
43	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	18:71 (7%) 18:71 (7%)	view
42	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	524:574 (4%) 533:583 (2%)	view
42	x 2	2019/manual 2020/manual	webp_animated.html webp_animated.html	1:67 (100%) 1:67 (100%)	view
41	x 2	2019/manual 2020/manual	webp.html webp.html	1:68 (100%) 1:68 (100%)	view

Duplicated Units

The list of top 50 duplicated units.

See data for all 300 unit duplicates...

Size	#	Folders	Files	Lines	Code
52	x 2	2019/harness 2020/harness	main.js main.js	68:123 78:133	view
51	x 2	2019/lib/parsers 2020/lib/parsers	mp4.js mp4.js	48:106 48:106	view
41	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	201:244 201:244	view
40	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1345:1392 842:889	view
48	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	384:436 391:443	view
37	x 2	2019/harness 2020/harness	compactTestList.js compactTestList.js	65:104 66:105	view
36	x 2	2019/harness 2020/harness	xhr.js xhr.js	29:74 29:74	view
35	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	562:599 785:822	view
34	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	337:375 343:381	view
32	x 2	2019/lib/eme 2020/lib/eme	licenseManager.js licenseManager.js	125:159 125:159	view
31	x 2	2019/lib/eme 2020/lib/eme	encryptedMediaPortability.js encryptedMediaPortability.js	111:151 111:151	view
60	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	620:684 843:907	view
30	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	611:645 611:645	view
205	x 2	2019/lib/functional 2020/lib/functional	mediaSourceSetup.js mediaSourceSetup.js	20:272 20:272	view
29	x 2	2019/harness 2020/harness	eventListener.js eventListener.js	25:60 25:60	view
28	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	679:708 690:719	view
27	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	434:467 434:467	view
27	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	1275:1307 1809:1841	view
26	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	478:507 559:588	view
26	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1522:1549 1038:1065	view
26	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1573:1600 1092:1119	view
26	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	537:565 546:574	view
26	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	1239:1268 1772:1801	view
26	x 2	2019/harness 2020/harness	focusManager.js focusManager.js	166:196 166:196	view
25	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1190:1216 674:700	view
25	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1681:1707 1207:1233	view
25	x 2	2019/lib/eme 2020/lib/eme	licenseManager.js licenseManager.js	20:48 20:48	view
25	x 2	2019/lib/eme 2020/lib/eme	encryptedMediaPortability.js encryptedMediaPortability.js	212:242 212:242	view
24	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	735:766 77:108	view
24	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1624:1649 1146:1171	view
48	x 2	2019/media 2020/media	conformanceTest.js conformanceTest.js	1925:1977 969:1021	view
24	x 2	2019/lib/eme 2020/lib/eme	licenseManager.js licenseManager.js	164:189 164:189	view
24	x 2	2019/lib/eme 2020/lib/eme	encryptedMediaPortability.js encryptedMediaPortability.js	179:210 179:210	view
24	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	1315:1340 1849:1874	view
24	x 2	2019/functional 2020/functional	formatSupportTest.js formatSupportTest.js	362:389 319:346	view
23	x 2	2019/media 2020/media	progressiveTest.js progressiveTest.js	276:300 272:296	view
23	x 2	2019/media 2020/media	progressiveTest.js progressiveTest.js	319:343 316:340	view
23	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	357:383 357:383	view
23	x 2	2019/harness 2020/harness	focusManager.js focusManager.js	136:162 136:162	view
22	x 2	2019/media 2020/media	progressiveTest.js progressiveTest.js	360:383 357:380	view
22	x 2	2019/media 2020/media	progressiveTest.js progressiveTest.js	425:448 423:446	view
22	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1130:1153 504:527	view
22	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	720:743 721:744	view
22	x 2	2019/functional 2020/functional	formatSupportTest.js formatSupportTest.js	65:92 59:86	view
73	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	515:604 515:604	view
21	x 2	2019/functional 2020/functional	functionalTest.js functionalTest.js	948:970 1201:1223	view
20	x 2	2019/lib/mse 2020/lib/mse	msutil.js msutil.js	139:160 139:160	view
20	x 3	2019/functional 2020/functional 2020/functional	formatSupportTest.js functionalTest.js formatSupportTest.js	299:324 1100:1125 243:268	view
19	x 2	2019/media 2020/media	conformanceTest.js mseCodecTest.js	1096:1116 466:486	view
19	x 2	2019/functional 2020/functional	formatSupportTest.js formatSupportTest.js	231:255 171:195	view