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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

6% duplication:

113,071 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
7,138 duplicated lines

1,281 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
shell/browser (<1%) --> shell/common (1%)	235	31 file pairs	details...
shell/browser (<1%) --> shell/renderer (2%)	188	54 file pairs	details...
spec-main (<1%) --> spec (2%)	182	7 file pairs	details...

Open 3D force graph...

Show more details on duplication between components...

Longest Duplicates

The list of 50 longest duplicates.

See data for all 1,281 duplicates...

Size	#	Folders	Files	Lines	Code
26	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	1179:1209 (1%) 1220:1250 (1%)	view
22	x 2	shell/browser shell/browser	native_browser_view_mac.mm native_browser_view_mac.mm	34:61 (9%) 181:208 (9%)	view
20	x 2	spec-main spec-main	api-autoupdater-darwin-spec.ts api-autoupdater-darwin-spec.ts	288:308 (5%) 338:358 (5%)	view
19	x 2	shell/browser shell/browser	native_window_mac.h native_window_views.h	39:57 (9%) 51:69 (9%)	view
18	x 2	spec-main spec-main	chromium-spec.ts chromium-spec.ts	557:576 (1%) 593:612 (1%)	view
18	x 2	spec-main/fixtures/auto-update/update-json spec-main/fixtures/auto-update/update	index.js index.js	1:24 (54%) 1:24 (56%)	view
18	x 2	spec-main spec-main	api-browser-window-spec.ts webview-spec.ts	4476:4493 (<1%) 645:662 (2%)	view
17	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	282:300 (<1%) 375:393 (<1%)	view
16	x 2	shell/browser/api shell/browser	electron_api_app.h electron_browser_client.h	136:151 (9%) 142:157 (6%)	view
16	x 2	spec-main spec-main	api-app-spec.ts api-app-spec.ts	745:760 (1%) 843:858 (1%)	view
16	x 2	spec-main spec-main	chromium-spec.ts chromium-spec.ts	1330:1346 (<1%) 1387:1403 (<1%)	view
15	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	1302:1317 (<1%) 1355:1370 (<1%)	view
15	x 2	shell/browser/api shell/browser	electron_api_app.cc electron_browser_client.cc	788:802 (1%) 703:717 (1%)	view
15	x 2	spec-main spec-main	api-app-spec.ts api-app-spec.ts	697:711 (<1%) 843:857 (<1%)	view
15	x 2	spec-main spec-main	api-app-spec.ts api-app-spec.ts	697:711 (<1%) 745:759 (<1%)	view
14	x 2	shell/renderer/api shell/renderer/api	electron_api_context_bridge.cc electron_api_context_bridge.cc	236:249 (2%) 263:276 (2%)	view
14	x 2	spec-main spec-main	logging-spec.ts logging-spec.ts	50:63 (8%) 67:80 (8%)	view
14	x 2	spec-main spec-main	logging-spec.ts logging-spec.ts	50:63 (8%) 159:172 (8%)	view
14	x 2	spec-main spec-main	logging-spec.ts logging-spec.ts	67:80 (8%) 159:172 (8%)	view
13	x 2	spec-main spec	api-web-contents-spec.ts webview-spec.js	1758:1772 (<1%) 1108:1122 (1%)	view
13	x 2	shell/browser/api shell/browser	electron_api_app.h electron_browser_client.cc	138:150 (7%) 704:716 (1%)	view
13	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	260:273 (<1%) 354:367 (<1%)	view
13	x 2	spec-main spec-main	logging-spec.ts logging-spec.ts	84:96 (7%) 100:112 (7%)	view
13	x 2	spec spec	webview-spec.js webview-spec.js	122:136 (1%) 410:424 (1%)	view
13	x 2	shell/browser/api shell/browser	electron_api_app.cc electron_browser_client.h	789:801 (1%) 144:156 (5%)	view
13	x 2	spec-main spec-main	api-browser-window-spec.ts api-web-contents-spec.ts	3808:3822 (<1%) 272:286 (<1%)	view
13	x 2	spec-main/fixtures/auto-update/update-json spec-main/fixtures/auto-update/update	index.js index.js	27:43 (39%) 26:42 (40%)	view
13	x 2	shell/browser shell/browser	electron_browser_client.cc electron_browser_client.h	704:716 (1%) 144:156 (5%)	view
13	x 2	spec-main spec-main	api-browser-window-spec.ts api-browser-window-spec.ts	1100:1112 (<1%) 1179:1191 (<1%)	view
13	x 2	spec-main spec-main	chromium-spec.ts chromium-spec.ts	1370:1382 (<1%) 1399:1411 (<1%)	view
13	x 2	spec-main spec-main	api-menu-spec.ts api-menu-spec.ts	263:278 (1%) 303:318 (1%)	view
13	x 2	spec-main spec-main	api-browser-window-spec.ts api-browser-window-spec.ts	2422:2438 (<1%) 2457:2473 (<1%)	view
13	x 2	shell/browser shell/browser	native_window_mac.h native_window_views.h	82:94 (6%) 97:109 (6%)	view
13	x 2	spec-main spec-main	api-context-bridge-spec.ts api-context-bridge-spec.ts	795:807 (1%) 907:919 (1%)	view
13	x 2	shell/browser/api shell/browser/api	electron_api_app.cc electron_api_app.h	789:801 (1%) 138:150 (7%)	view
12	x 2	shell/browser/api shell/browser	electron_api_app.h electron_browser_client.h	123:134 (6%) 129:140 (4%)	view
12	x 2	spec-main spec-main	api-app-spec.ts api-app-spec.ts	1528:1542 (<1%) 1553:1567 (<1%)	view
12	x 2	spec-main spec-main	guest-window-manager-spec.ts guest-window-manager-spec.ts	103:115 (6%) 125:137 (6%)	view
12	x 2	shell/browser/net shell/browser/net	proxying_websocket.cc proxying_websocket.h	230:241 (3%) 99:110 (11%)	view
12	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	1921:1932 (<1%) 1938:1949 (<1%)	view
12	x 2	spec spec	asar-spec.js asar-spec.js	375:387 (<1%) 423:435 (<1%)	view
12	x 2	ROOT ROOT	gni filenames.auto.gni filenames.auto.gni	149:160 (3%) 279:290 (3%)	view
12	x 2	shell/browser shell/browser	native_window_mac.h native_window_views.h	68:79 (6%) 84:95 (5%)	view
12	x 2	spec-main spec-main	guest-window-manager-spec.ts guest-window-manager-spec.ts	83:95 (6%) 103:115 (6%)	view
12	x 2	spec spec	asar-spec.js asar-spec.js	439:451 (<1%) 455:467 (<1%)	view
12	x 2	spec-main spec-main	guest-window-manager-spec.ts guest-window-manager-spec.ts	83:95 (6%) 125:137 (6%)	view
11	x 2	spec-main spec-main	api-browser-window-spec.ts api-browser-window-spec.ts	3066:3080 (<1%) 3087:3100 (<1%)	view
11	x 2	spec-main spec-main	api-menu-spec.ts api-menu-spec.ts	278:291 (1%) 322:335 (1%)	view
11	x 2	spec-main spec-main	api-net-spec.ts api-net-spec.ts	627:637 (<1%) 651:661 (<1%)	view
11	x 2	spec/fixtures/pages/service-worker spec/fixtures/pages/service-worker	badge-index.html index.html	18:28 (37%) 7:17 (64%)	view

Duplicated Units

The list of top 2 duplicated units.

See data for all 2 unit duplicates...

Size	#	Folders	Files	Lines	Code
9	x 2	shell/browser/ui/win shell/browser/api	notify_icon_host.cc electron_api_power_monitor_win.cc	122:132 58:68	view
6	x 2	spec-main spec	chromium-spec.ts webview-spec.js	295:302 43:50	view