• There are 447 files with units, with 46,628 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 4 complex files (McCabe index sum 126-250; 2,523 lines of code)
• 31 medium complex files (McCabe index sum 51-125; 12,276 lines of code)
• 43 slightly complex files (McCabe index sum 26-50; 8,327 lines of code)
• 369 simple files (McCabe index sum 1-25; 23,502 lines of code)
• 364 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
SimpleConfig.java in scripts/src/main/java/com/gu/typesafe/config/impl	940	83	205	22	24
query.js in kahuna/public/js/search	596	37	150	25	31
SupplierProcessors.scala in common-lib/src/main/scala/com/gu/mediaservice/lib/cleanup	515	41	135	26	11
SimpleConfigOrigin.java in scripts/src/main/java/com/gu/typesafe/config/impl	472	29	134	28	22
SimpleConfigObject.java in scripts/src/main/java/com/gu/typesafe/config/impl	542	37	122	23	23
MediaApi.scala in media-api/app/controllers	711	27	121	17	23
gr-image-metadata.js in kahuna/public/js/components/gr-image-metadata	561	25	100	18	29
ElasticSearch.scala in thrall/app/lib/elasticsearch	678	36	94	14	9
Tokens.java in scripts/src/main/java/com/gu/typesafe/config/impl	421	72	94	22	5
ConfigNodeObject.java in scripts/src/main/java/com/gu/typesafe/config/impl	241	9	92	38	38
SerializedConfigValue.java in scripts/src/main/java/com/gu/typesafe/config/impl	440	23	85	19	20
Parseable.java in scripts/src/main/java/com/gu/typesafe/config/impl	643	41	76	12	8
ConfigImplUtil.java in scripts/src/main/java/com/gu/typesafe/config/impl	235	14	75	32	15
results.js in kahuna/public/js/search	730	22	72	10	10
AbstractConfigValue.java in scripts/src/main/java/com/gu/typesafe/config/impl	279	37	72	26	9
ConfigDocumentParser.java in scripts/src/main/java/com/gu/typesafe/config/impl	576	20	71	12	9
ConfigBeanImpl.java in scripts/src/main/java/com/gu/typesafe/config/impl	245	7	71	29	24
ResolveSource.java in scripts/src/main/java/com/gu/typesafe/config/impl	269	19	70	26	10
Tokenizer.java in scripts/src/main/java/com/gu/typesafe/config/impl	558	29	69	12	11
UsageRights.scala in common-lib/src/main/scala/com/gu/mediaservice/model	498	32	67	13	4
ElasticSearch.scala in media-api/app/lib/elasticsearch	581	24	67	12	10
QueryBuilder.scala in media-api/app/lib/elasticsearch	188	6	66	35	26
GridClient.scala in common-lib/src/main/scala/com/gu/mediaservice	229	21	64	28	4
ImageLoaderController.scala in image-loader/app/controllers	570	13	63	11	13
ConfigFactory.java in scripts/src/main/java/com/gu/typesafe/config	293	60	63	22	2
ConfigException.java in scripts/src/main/java/com/gu/typesafe/config	277	54	63	23	5
QuerySyntax.scala in media-api/app/lib/querysyntax	222	30	62	28	15
SimpleConfigList.java in scripts/src/main/java/com/gu/typesafe/config/impl	372	35	61	16	11
ImageOperations.scala in common-lib/src/main/scala/com/gu/mediaservice/lib/imaging	247	13	58	23	26
image-editor.js in kahuna/public/js/edits	379	14	55	15	22
MessageProcessor.scala in thrall/app/lib/kinesis	189	12	55	29	23
MessageTranslator.scala in thrall/app/lib/kinesis	83	1	53	64	53
Uploader.scala in image-loader/app/model	451	17	51	11	7
PathParser.java in scripts/src/main/java/com/gu/typesafe/config/impl	207	14	51	25	14
ImageResponse.scala in media-api/app/lib	361	18	51	14	8
ProviderLoader.scala in common-lib/src/main/scala/com/gu/mediaservice/lib/config	172	15	49	28	6
main.js in kahuna/public/js	426	23	47	11	9
ConfigImpl.java in scripts/src/main/java/com/gu/typesafe/config/impl	422	27	47	11	5
DynamoDB.scala in common-lib/src/main/scala/com/gu/mediaservice/lib/aws	220	27	47	21	9
service.js in kahuna/public/js/edits	195	21	44	23	8
ConfigConcatenation.java in scripts/src/main/java/com/gu/typesafe/config/impl	217	15	44	20	19
metadata-templates.js in kahuna/public/js/metadata-templates	189	10	43	23	12
UsageGroup.scala in usage/app/model	246	22	42	17	5
ProposeS3Changes.scala in scripts/src/main/scala/com/gu/mediaservice/scripts	219	8	41	19	12
usage-rights-editor.js in kahuna/public/js/usage-rights	220	8	40	18	22
Path.java in scripts/src/main/java/com/gu/typesafe/config/impl	177	17	40	23	6
EsScript.scala in scripts/src/main/scala/com/gu/mediaservice/scripts	354	7	40	11	19
ElasticSearchModel.scala in media-api/app/lib/elasticsearch	252	10	39	15	11
Subject.scala in common-lib/src/main/scala/com/gu/mediaservice/lib/metadata	62	1	38	61	38
UsageApi.scala in usage/app/controllers	382	14	37	10	10

• 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.