• There are 495 files with units, with 54,486 lines of code.
• 2 very complex files (McCabe index sum 251+; 5,099 lines of code)
• 2 complex files (McCabe index sum 126-250; 2,396 lines of code)
• 20 medium complex files (McCabe index sum 51-125; 10,102 lines of code)
• 44 slightly complex files (McCabe index sum 26-50; 9,820 lines of code)
• 427 simple files (McCabe index sum 1-25; 27,069 lines of code)
• 123 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
SelParser.java in netflix-sel/src/main/java/com/netflix/sel/ast	3509	167	981	28	44
SelParserTokenManager.java in netflix-sel/src/main/java/com/netflix/sel/ast	1590	38	572	36	195
MaestroTask.java in maestro-engine/src/main/java/com/netflix/maestro/engine/tasks	1096	33	172	16	35
MaestroWorkflowDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	1300	53	137	11	13
JavaCharStream.java in netflix-sel/src/main/java/com/netflix/sel/ast	409	40	111	27	23
ForeachStepRuntime.java in maestro-engine/src/main/java/com/netflix/maestro/engine/steps	857	19	101	12	17
ParamsMergeHelper.java in maestro-engine/src/main/java/com/netflix/maestro/engine/params	576	24	99	17	13
SelParserEvaluationVisitor.java in netflix-sel/src/main/java/com/netflix/sel/visitor	580	46	99	17	10
MaestroStepInstanceDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	1040	46	96	9	8
MaestroStepInstanceActionDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	682	23	93	14	16
MaestroWorkflowInstanceDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	1018	31	89	9	7
MaestroParamExtension.java in maestro-engine/src/main/java/com/netflix/maestro/engine/eval	470	24	83	18	11
ParamParser.java in maestro-dsl/src/main/java/com/netflix/maestro/dsl/parsers	294	17	83	28	18
TaskHelper.java in maestro-engine/src/main/java/com/netflix/maestro/engine/utils	302	12	80	26	26
MaestroRunStrategyDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	944	37	75	8	11
FlowActor.java in maestro-flow/src/main/java/com/netflix/maestro/flow/actor	317	24	71	22	10
MaestroStepBreakpointDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	727	22	66	9	7
MaestroSignalBrokerDao.java in maestro-signal/src/main/java/com/netflix/maestro/signal/dao	297	16	59	20	16
WhileStepRuntime.java in maestro-engine/src/main/java/com/netflix/maestro/engine/steps	524	15	58	11	12
ForeachStepOverview.java in maestro-common/src/main/java/com/netflix/maestro/models/instance	262	16	58	22	6
SelLong.java in netflix-sel/src/main/java/com/netflix/sel/type	157	14	53	34	19
StepRuntimeSummary.java in maestro-engine/src/main/java/com/netflix/maestro/engine/execution	364	25	52	14	10
SelMap.java in netflix-sel/src/main/java/com/netflix/sel/type	139	9	52	37	17
SelDouble.java in netflix-sel/src/main/java/com/netflix/sel/type	143	11	51	36	18
WorkflowActionHandler.java in maestro-engine/src/main/java/com/netflix/maestro/engine/handlers	406	17	50	12	9
WorkflowParser.java in maestro-dsl/src/main/java/com/netflix/maestro/dsl/parsers	278	13	49	18	11
SelTypeUtil.java in netflix-sel/src/main/java/com/netflix/sel/type	223	12	48	22	13
MaestroTagPermitTask.java in maestro-engine/src/main/java/com/netflix/maestro/engine/tasks	240	14	47	20	8
ParamEvaluator.java in maestro-engine/src/main/java/com/netflix/maestro/engine/eval	405	17	44	11	8
AbstractDatabaseDao.java in maestro-database/src/main/java/com/netflix/maestro/database	267	18	44	16	13
BaseActor.java in maestro-flow/src/main/java/com/netflix/maestro/flow/actor	208	23	42	20	5
SubworkflowStepRuntime.java in maestro-engine/src/main/java/com/netflix/maestro/engine/steps	328	8	39	12	11
ExecutionContext.java in maestro-flow/src/main/java/com/netflix/maestro/flow/engine	241	20	39	16	5
SelParserDefaultVisitor.java in netflix-sel/src/main/java/com/netflix/sel/ast	118	38	38	32	1
RollupAggregationHelper.java in maestro-engine/src/main/java/com/netflix/maestro/engine/utils	184	8	36	20	12
ParamsManager.java in maestro-engine/src/main/java/com/netflix/maestro/engine/params	296	10	36	12	10
Timeline.java in maestro-common/src/main/java/com/netflix/maestro/models/timeline	157	7	36	23	18
WorkflowController.java in maestro-server/src/main/java/com/netflix/maestro/server/controllers	328	17	36	11	8
MaestroForeachFlattenedDao.java in maestro-extensions/src/main/java/com/netflix/maestro/extensions/dao	435	12	36	8	9
SelUtilFunc.java in netflix-sel/src/main/java/com/netflix/sel/type	162	14	35	22	15
SelString.java in netflix-sel/src/main/java/com/netflix/sel/type	267	12	35	13	5
MapParameter.java in maestro-common/src/main/java/com/netflix/maestro/models/parameter	199	11	35	18	19
WorkflowGraph.java in maestro-engine/src/main/java/com/netflix/maestro/engine/transformation	230	9	34	15	10
LiteralEvaluator.java in maestro-engine/src/main/java/com/netflix/maestro/engine/eval	172	9	33	19	8
WorkflowConstraint.java in maestro-common/src/main/java/com/netflix/maestro/validations	181	7	33	18	9
TaskActor.java in maestro-flow/src/main/java/com/netflix/maestro/flow/actor	132	12	33	25	10
RunRequest.java in maestro-engine/src/main/java/com/netflix/maestro/engine/execution	171	16	31	18	7
DatabaseConfiguration.java in maestro-database/src/main/java/com/netflix/maestro/database	150	26	31	21	3
MaestroTagPermitDao.java in maestro-engine/src/main/java/com/netflix/maestro/engine/dao	349	16	30	9	5
MaestroFinalFlowStatusCallback.java in maestro-engine/src/main/java/com/netflix/maestro/engine/listeners	296	8	30	10	17

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.