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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

2% duplication:

23,998 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
708 duplicated lines

77 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
src/com/facebook/buck/android (1%) --> src/com/facebook/buck/java (2%)	153	19 file pairs	details...

Open 3D force graph...

Show more details on duplication between components...

Longest Duplicates

The list of 20 longest duplicates.

See data for all 77 duplicates...

Size	#	Folders	Files	Lines	Code
29	x 2	src/com/facebook/buck/cli src/com/facebook/buck/cli	AuditClasspathCommand.java AuditInputCommand.java	46:84 (32%) 38:76 (59%)	view
13	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	IntermediateDexRule.java AccumulateClassNames.java	84:102 (30%) 215:233 (12%)	view
12	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidBinaryRule.java PrebuiltNativeLibrary.java	1333:1348 (1%) 140:155 (17%)	view
12	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	PrebuiltNativeLibrary.java PrebuiltJarRule.java	140:155 (17%) 273:288 (7%)	view
12	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	AndroidBinaryRule.java PrebuiltJarRule.java	1333:1348 (1%) 273:288 (7%)	view
11	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	RobolectricTestRule.java JavaTestRule.java	68:78 (14%) 82:92 (4%)	view
11	x 2	src/com/facebook/buck/dalvik src/com/facebook/buck/dalvik	DalvikAwareOutputStreamHelper.java DefaultZipOutputStreamHelper.java	83:97 (19%) 74:88 (26%)	view
10	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidResourceRule.java PrebuiltNativeLibrary.java	275:288 (5%) 140:153 (14%)	view
10	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidBinaryRule.java AndroidResourceRule.java	1333:1346 (1%) 275:288 (5%)	view
10	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidLibraryRule.java AndroidResourceRule.java	127:142 (12%) 272:287 (5%)	view
10	x 2	src/com/facebook/buck/dalvik src/com/facebook/buck/dalvik	DefaultZipSplitter.java DefaultZipSplitter.java	53:62 (9%) 74:83 (9%)	view
10	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	AndroidResourceRule.java PrebuiltJarRule.java	275:288 (5%) 273:286 (6%)	view
10	x 2	plugin/src/com/facebook/buck/plugin/intellij/ui plugin/src/com/facebook/buck/plugin/intellij/ui	MessageTreeRenderer.java TargetsTreeRenderer.java	34:45 (15%) 36:47 (23%)	view
9	x 2	plugin/src/com/facebook/buck/plugin/intellij plugin/src/com/facebook/buck/plugin/intellij	BuckPluginComponent.java BuckPluginComponent.java	174:182 (6%) 193:201 (6%)	view
9	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidLibraryRule.java PrebuiltNativeLibrary.java	130:142 (11%) 140:152 (13%)	view
9	x 2	src/com/facebook/buck/dalvik src/com/facebook/buck/dalvik	DalvikAwareZipSplitterFactory.java DefaultZipSplitterFactory.java	33:41 (40%) 44:52 (36%)	view
9	x 2	src/com/facebook/buck/android src/com/facebook/buck/android	AndroidBinaryRule.java AndroidLibraryRule.java	1333:1345 (1%) 130:142 (11%)	view
9	x 2	src/com/facebook/buck/java src/com/facebook/buck/java	JavaTestRule.java PrebuiltJarRule.java	419:431 (3%) 273:285 (5%)	view
9	x 2	src/com/facebook/buck/android src/com/facebook/buck/java	AndroidBinaryRule.java JavaTestRule.java	1333:1345 (1%) 419:431 (3%)	view
9	x 2	src/com/facebook/buck/dalvik src/com/facebook/buck/dalvik	DefaultZipSplitter.java DefaultZipSplitterFactory.java	86:94 (8%) 54:62 (36%)	view

Duplicated Units

The list of top 4 duplicated units.

See data for all 4 unit duplicates...

Size	#	Folders	Files	Lines	Code
6	x 3	src/com/facebook/buck/cli src/com/facebook/buck/cli src/com/facebook/buck/cli	UninstallEvent.java InstallEvent.java StartActivityEvent.java	101:108 101:108 111:118	view
6	x 2	src/com/facebook/buck/event/listener src/com/facebook/buck/event/listener	ChromeTraceBuildListener.java ChromeTraceBuildListener.java	160:166 227:233	view
6	x 2	src/com/facebook/buck/event/listener src/com/facebook/buck/event/listener	ChromeTraceBuildListener.java ChromeTraceBuildListener.java	169:175 342:348	view
6	x 2	src/com/facebook/buck/rules src/com/facebook/buck/step	BuildEvent.java StepEvent.java	105:112 110:117	view