• File size measurements show the distribution of size of files.
• Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
• It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

• There are 371 files with 42,457 lines of code.
• 6 very long files (8,884 lines of code)
• 18 long files (12,781 lines of code)
• 21 medium size files (6,237 lines of codeclsfd_ftr_w_mp_ins)
• 51 small files (7,018 lines of code)
• 275 very small files (7,537 lines of code)

There are 101 files with lines longer than 120 characters. In total, there are 533 long lines.

File	# lines	# units	# long lines
ParserGenerator.java in src/org/intellij/grammar/generator	1877	42	48
KnownAttribute.java in src/org/intellij/grammar	133	7	39
LivePreviewParser.java in src/org/intellij/grammar/livePreview	583	17	32
JFlexSyntaxHighlighterFactory.java in src/org/intellij/jflex/editor	82	-	24
BnfSyntaxHighlighter.java in src/org/intellij/grammar/editor	70	-	18
GrammarParser.java in antlr-based-bootstrap/peg	968	7	16
plugin.xml in resources/META-INF	119	-	15
BnfIntroduceRuleHandler.java in src/org/intellij/grammar/refactor	273	13	14
LightPsi.java in src/org/intellij/grammar	202	12	12
ExpressionHelper.java in src/org/intellij/grammar/generator	337	18	12
GrammarLexer.java in antlr-based-bootstrap/peg	939	32	11
ExpressionGeneratorHelper.java in src/org/intellij/grammar/generator	214	1	11
Generator.java in antlr-based-bootstrap/peg	609	21	10
FleetExternalRules.expected.java in testData/fleet	638	97	10
ExternalRulesLambdas.expected.java in testData/generator	561	89	10
GeneratedParserUtilBase.java in src/org/intellij/grammar/parser	1106	87	10
GenOptions.PSI.expected.java in testData/generator	196	26	9
ExternalRules.expected.java in testData/generator	638	97	9
JavaHelper.java in src/org/intellij/grammar/java	939	65	8
BnfFirstNextAnalyzer.java in src/org/intellij/grammar/analysis	399	15	8
ParserGeneratorUtil.java in src/org/intellij/grammar/generator	815	59	8
RuleGraphHelper.java in src/org/intellij/grammar/generator	766	42	8
BnfCompletionContributor.java in src/org/intellij/grammar	222	8	8
JFlexCompletionContributor.java in src/org/intellij/jflex/editor	115	4	7
UtilMethods.PSI.expected.java in testData/generator	101	10	6
BnfFileImpl.java in src/org/intellij/grammar/psi/impl	194	10	6
BnfDiagramProvider.java in src/org/intellij/grammar/diagram	308	11	6
BnfIntroduceTokenHandler.java in src/org/intellij/grammar/refactor	247	5	5
LivePreviewHelper.java in src/org/intellij/grammar/livePreview	154	8	5
GenOptions.expected.java in testData/generator	111	12	4
BnfIntroduceRulePopup.java in src/org/intellij/grammar/refactor	118	8	4
BnfExpressionOptimizer.java in src/org/intellij/grammar/refactor	130	7	4
BnfStringRefContributor.java in src/org/intellij/grammar/psi/impl	55	2	4
GenOptions.java in src/org/intellij/grammar/generator	54	1	4
BnfGenerateLexerAction.java in src/org/intellij/grammar/actions	221	10	4
FileGeneratorUtil.java in src/org/intellij/grammar/actions	107	2	4
plugin-java.xml in resources/META-INF	30	-	3
JFlexFindUsagesProvider.java in src/org/intellij/jflex/editor	69	3	3
JFlexParserUtil.java in src/org/intellij/jflex/parser	42	5	3
JFlexStateUsageSearcher.java in src/org/intellij/jflex/psi/impl	61	2	3
JFlexJavaCodeInjector.java in src/org/intellij/jflex/psi/impl	113	1	3
JavaRefHelper.java in src/org/intellij/jflex/psi/impl	89	1	3
JFlexPsiImplUtil.java in src/org/intellij/jflex/psi/impl	88	5	3
BnfColorSettingsPage.java in src/org/intellij/grammar/editor	107	3	3
FleetBnfFileWrapper.java in src/org/intellij/grammar/fleet	91	5	3
BnfReferenceImpl.java in src/org/intellij/grammar/psi/impl	122	5	3
BnfStringImpl.java in src/org/intellij/grammar/psi/impl	230	16	3
GrammarUtil.java in src/org/intellij/grammar/psi/impl	200	23	3
GrammarAtCaretPassFactory.java in src/org/intellij/grammar/livePreview	99	4	3
NameShortener.java in src/org/intellij/grammar/generator	123	5	3