• There are 74 files with units, with 3,499 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 0 medium complex files (McCabe index sum 51-125; 0 lines of code)
• 12 slightly complex files (McCabe index sum 26-50; 1,944 lines of code)
• 62 simple files (McCabe index sum 1-25; 1,555 lines of code)
• 24 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
index.js in packages/@pollyjs/adapter/src	229	26	47	21	7
request.js in packages/@pollyjs/core/src/-private	201	27	40	20	7
index.js in packages/@pollyjs/persister/src	153	18	38	25	8
polly.js in packages/@pollyjs/core/src	197	24	37	19	4
index.js in packages/@pollyjs/adapter-fetch/src	165	8	34	21	11
index.js in packages/@pollyjs/core/src/server	154	22	34	22	6
index.js in packages/@pollyjs/adapter-node-http/src	236	12	30	13	5
index.js in packages/@pollyjs/adapter-puppeteer/src	180	12	30	17	7
index.js in packages/@pollyjs/ember	78	8	28	36	11
event-emitter.js in packages/@pollyjs/core/src/-private	131	12	27	21	4
route.js in packages/@pollyjs/core/src/server	93	13	26	28	5
index.js in packages/@pollyjs/adapter-xhr/src	127	8	26	20	10
http-base.js in packages/@pollyjs/core/src/-private	79	12	24	30	10
url.js in packages/@pollyjs/utils/src/utils	59	6	17	29	6
handler.js in packages/@pollyjs/core/src/server	94	10	15	16	3
normalize-request.js in packages/@pollyjs/core/src/utils	50	5	15	30	6
ajax.js in packages/@pollyjs/persister-rest/src	39	2	13	33	8
get-url-from-options.js in packages/@pollyjs/adapter-node-http/src/utils	22	1	12	55	12
normalize-recorded-response.js in packages/@pollyjs/adapter/src/utils	25	3	12	48	5
index.js in packages/@pollyjs/persister-local-storage/src	41	8	11	27	2
response.js in packages/@pollyjs/core/src/-private	35	5	10	29	3
http-headers.js in packages/@pollyjs/core/src/utils	32	4	10	31	4
buffer.js in packages/@pollyjs/utils/src/utils/serializers	21	1	10	48	10
response.js in packages/@pollyjs/persister/src/har	43	3	10	23	5
logger.js in packages/@pollyjs/core/src/-private	53	6	9	17	2
container.js in packages/@pollyjs/core/src/-private	41	6	9	22	2
request.js in packages/@pollyjs/persister/src/har	44	3	9	20	5
interceptor.js in packages/@pollyjs/core/src/-private	30	7	8	27	2
server.js in packages/@pollyjs/node-server/src	46	2	8	17	6
api.js in packages/@pollyjs/node-server/src	39	6	8	21	2
index.js in packages/@pollyjs/persister-rest/src	45	7	8	18	2
browser.config.js in scripts/rollup	56	3	7	13	3
index.js in packages/@pollyjs/persister-fs/src	26	6	7	27	2
url-to-options.js in packages/@pollyjs/adapter-node-http/src/utils	21	1	6	29	6
middleware.js in packages/@pollyjs/core/src/server	24	2	6	25	4
form-data.js in packages/@pollyjs/utils/src/utils/serializers	17	1	6	35	6
log.js in packages/@pollyjs/persister/src/har	37	3	6	16	3
event.js in packages/@pollyjs/core/src/-private	19	3	5	26	3
index.js in packages/@pollyjs/persister-in-memory/src	16	4	5	31	2
register-api.js in packages/@pollyjs/node-server/src/express	43	3	5	12	2
serializer-headers.js in packages/@pollyjs/adapter-fetch/src/utils	8	1	4	50	4
merge-chunks.js in packages/@pollyjs/adapter-node-http/src/utils	9	1	4	44	4
validators.js in packages/@pollyjs/core/src/utils	40	3	4	10	2
merge-configs.js in packages/@pollyjs/core/src/utils	9	2	4	44	3
guid-for-recording.js in packages/@pollyjs/core/src/utils	14	3	4	29	2
resolve-xhr.js in packages/@pollyjs/adapter-xhr/src/utils	14	1	4	29	4
blob.js in packages/@pollyjs/utils/src/utils/serializers	22	2	4	18	3
parse-url.js in packages/@pollyjs/core/src/utils	14	1	3	21	3
serialize-response-headers.js in packages/@pollyjs/adapter-xhr/src/utils	12	1	3	25	3
is-expired.js in packages/@pollyjs/adapter/src/utils	10	1	3	30	3

• 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.