• There are 351 files with units, with 35,998 lines of code.
• 1 very complex files (McCabe index sum 251+; 1,148 lines of code)
• 6 complex files (McCabe index sum 126-250; 3,549 lines of code)
• 22 medium complex files (McCabe index sum 51-125; 7,987 lines of code)
• 45 slightly complex files (McCabe index sum 26-50; 9,019 lines of code)
• 277 simple files (McCabe index sum 1-25; 14,295 lines of code)
• 74 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
AslDocumentAnalyzer.scala in atlas-lsp/src/main/scala/com/netflix/atlas/lsp	1148	50	281	24	23
RoaringTagIndex.scala in atlas-core/src/main/scala/com/netflix/atlas/core/index	663	43	187	28	15
Interpreter.scala in atlas-core/src/main/scala/com/netflix/atlas/core/stacklang	582	38	181	31	34
MathExpr.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	865	77	181	21	14
Block.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	620	55	180	29	16
Strings.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	461	37	153	33	14
Query.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	358	37	129	36	17
Ticks.scala in atlas-chart/src/main/scala/com/netflix/atlas/chart/graphics	493	29	114	23	15
MathVocabulary.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	1093	59	105	10	8
UriDocumentAnalyzer.scala in atlas-lsp/src/main/scala/com/netflix/atlas/lsp	524	31	103	20	12
StringFormatter.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	244	8	91	37	33
TypedLwcEventFilter.scala in atlas-lwc-events/src/main/scala/com/netflix/atlas/lwc/events	173	19	87	50	19
DatapointConverter.scala in atlas-lwc-events/src/main/scala/com/netflix/atlas/lwc/events	309	31	86	28	14
TimeSeriesBuffer.scala in atlas-core/src/main/scala/com/netflix/atlas/core/db	363	35	86	24	7
PublishPayloads.scala in atlas-webapi/src/main/scala/com/netflix/atlas/webapi	397	36	85	21	8
UnitPrefix.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	162	11	83	51	17
LwcMessages.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/model	332	14	74	22	24
SortedTagMap.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	328	36	70	21	5
StreamContext.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/stream	271	25	68	25	11
Grapher.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/graph	386	21	65	17	14
InternMap.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	280	20	63	23	9
StandardVocabulary.scala in atlas-core/src/main/scala/com/netflix/atlas/core/stacklang	444	33	63	14	4
ExprApi.scala in atlas-webapi/src/main/scala/com/netflix/atlas/webapi	245	23	63	26	10
EvaluatorImpl.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/stream	463	26	60	13	8
JsonCodec.scala in atlas-chart/src/main/scala/com/netflix/atlas/chart	467	29	60	13	11
UriParser.scala in atlas-core/src/main/scala/com/netflix/atlas/core/uri	184	12	58	32	13
StreamOps.scala in atlas-pekko/src/main/scala/com/netflix/atlas/pekko	448	25	57	13	7
ArrayHelper.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	221	14	53	24	18
RefDoubleHashMap.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	160	12	52	33	7
QueryVocabulary.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	498	24	50	10	4
AggregateCollector.scala in atlas-core/src/main/scala/com/netflix/atlas/core/db	227	17	50	22	10
BlockStore.scala in atlas-core/src/main/scala/com/netflix/atlas/core/db	182	15	48	26	9
TextCopyBuffer.scala in atlas-postgres/src/main/scala/com/netflix/atlas/postgres	164	22	48	29	12
DataExpr.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	213	26	47	22	5
ExprNormalizer.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	154	10	46	30	12
Scales.scala in atlas-chart/src/main/scala/com/netflix/atlas/chart/graphics	114	16	44	39	6
SqlUtils.scala in atlas-postgres/src/main/scala/com/netflix/atlas/postgres	396	17	44	11	15
ExprInterpreter.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/stream	148	16	43	29	7
MemoryDatabase.scala in atlas-core/src/main/scala/com/netflix/atlas/core/db	205	15	42	20	8
BinaryCopyBuffer.scala in atlas-postgres/src/main/scala/com/netflix/atlas/postgres	229	22	41	18	6
StatefulVocabulary.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	690	25	40	6	5
FilterExpr.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	236	23	39	17	7
JsonParserHelper.scala in atlas-json3/src/main/scala/com/netflix/atlas/json3	98	15	38	39	5
RefIntHashMap.scala in atlas-core/src/main/scala/com/netflix/atlas/core/util	125	10	38	30	7
AggrDatapoint.scala in atlas-eval/src/main/scala/com/netflix/atlas/eval/model	191	13	38	20	8
DataType.scala in atlas-core/src/main/scala/com/netflix/atlas/core/stacklang/ast	105	11	37	35	5
DataVocabulary.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	220	10	37	17	7
StyleExpr.scala in atlas-core/src/main/scala/com/netflix/atlas/core/model	150	12	37	25	5
DataSet.scala in atlas-core/src/main/scala/com/netflix/atlas/core/db	399	12	37	9	6
RemoteLwcEventClient.scala in atlas-lwc-events/src/main/scala/com/netflix/atlas/lwc/events	244	13	36	15	7

• 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.