• There are 87 files with units, with 14,559 lines of code.
• 3 very complex files (McCabe index sum 251+; 6,070 lines of code)
• 1 complex files (McCabe index sum 126-250; 864 lines of code)
• 7 medium complex files (McCabe index sum 51-125; 1,735 lines of code)
• 18 slightly complex files (McCabe index sum 26-50; 2,942 lines of code)
• 58 simple files (McCabe index sum 1-25; 2,948 lines of code)
• 21 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
EVCacheImpl.java in evcache-core/src/main/java/com/netflix/evcache	3037	105	1072	35	99
EVCacheClient.java in evcache-core/src/main/java/com/netflix/evcache/pool	1613	123	393	24	28
EVCacheClientPool.java in evcache-core/src/main/java/com/netflix/evcache/pool	1420	72	377	27	40
EVCacheMemcachedClient.java in evcache-core/src/main/java/net/spy/memcached	864	43	230	27	25
EVCacheLatchImpl.java in evcache-core/src/main/java/com/netflix/evcache/operation	373	25	113	30	27
EVCacheOperationFuture.java in evcache-core/src/main/java/com/netflix/evcache/operation	311	26	75	24	20
EVCacheKey.java in evcache-core/src/main/java/com/netflix/evcache	156	14	61	39	13
EVCacheMetricsFactory.java in evcache-core/src/main/java/com/netflix/evcache/metrics	352	20	58	16	19
EVCacheClientPoolManager.java in evcache-core/src/main/java/com/netflix/evcache/pool	200	23	56	28	12
EVCacheEvent.java in evcache-core/src/main/java/com/netflix/evcache/event	170	29	53	31	14
HotKeyListener.java in evcache-core/src/main/java/com/netflix/evcache/event/hotkey	173	9	52	30	11
EVCacheBulkGetFuture.java in evcache-core/src/main/java/com/netflix/evcache/operation	297	15	50	17	28
EurekaNodeListProvider.java in evcache-client/src/main/java/com/netflix/evcache/pool/eureka	176	2	49	28	48
EVCacheSerializingTranscoder.java in evcache-core/src/main/java/com/netflix/evcache	262	10	45	17	14
EVCacheAsciiNodeImpl.java in evcache-core/src/main/java/net/spy/memcached/protocol/ascii	191	28	44	23	5
EVCacheNodeImpl.java in evcache-core/src/main/java/net/spy/memcached/protocol/binary	193	27	40	21	5
EVCacheMemcachedNodeROImpl.java in evcache-core/src/main/java/net/spy/memcached	132	40	40	30	1
SimpleNodeListProvider.java in evcache-core/src/main/java/com/netflix/evcache/pool	188	5	39	21	16
EVCacheInMemoryCache.java in evcache-core/src/main/java/com/netflix/evcache	222	11	34	15	12
EVCacheConnectionObserver.java in evcache-core/src/main/java/com/netflix/evcache/pool/observer	137	19	33	24	6
EVCacheFutures.java in evcache-core/src/main/java/com/netflix/evcache/operation	115	14	32	28	6
BaseAsciiConnectionFactory.java in evcache-core/src/main/java/com/netflix/evcache/connection	154	29	30	19	2
EVCacheConnection.java in evcache-core/src/main/java/net/spy/memcached	109	8	29	27	14
BaseConnectionFactory.java in evcache-core/src/main/java/com/netflix/evcache/connection	149	28	29	19	2
EVCacheInternalImpl.java in evcache-core/src/main/java/com/netflix/evcache	125	12	29	23	8
MetaGetOperationImpl.java in evcache-core/src/main/java/net/spy/memcached/protocol/ascii	105	5	28	27	14
EVCacheRESTService.java in evcacheproxy/src/main/java/com/netflix/evcache/service/resources	148	7	28	19	9
EVCacheNodeLocator.java in evcache-core/src/main/java/com/netflix/evcache/pool	150	14	27	18	7
EVCacheItemMetaData.java in evcache-core/src/main/java/com/netflix/evcache/operation	89	16	26	29	10
EVCacheTracingEventListener.java in evcache-zipkin-tracing/src/main/java/com/netflix/evcache	140	9	25	18	9
EVCacheClientUtil.java in evcache-core/src/main/java/com/netflix/evcache/pool	99	4	25	25	11
CircularIterator.java in evcache-core/src/main/java/com/netflix/evcache/util	73	5	21	29	9
EVCacheConfig.java in evcache-core/src/main/java/com/netflix/evcache/util	116	17	20	17	3
ServerGroup.java in evcache-core/src/main/java/com/netflix/evcache/pool	52	7	19	37	10
EVCacheValue.java in evcache-core/src/main/java/com/netflix/evcache/pool	74	8	19	26	11
KeyHasher.java in evcache-core/src/main/java/com/netflix/evcache/util	116	4	18	16	12
NodeLocatorLookup.java in evcache-core/src/main/java/com/netflix/evcache/pool	94	5	17	18	7
EVCacheClientZipkinTracingSample.java in evcache-client-sample/src/main/java/com/netflix/evcache/sample	87	5	15	17	5
EVCacheFuture.java in evcache-core/src/main/java/com/netflix/evcache/operation	72	14	15	21	2
ServerGroupCircularIterator.java in evcache-core/src/main/java/com/netflix/evcache/util	59	5	15	25	6
EVCachePersistedProperties.java in evcache-core/src/main/java/com/netflix/evcache/config	113	5	15	13	8
EVCache.java in evcache-core/src/main/java/com/netflix/evcache	217	3	15	7	13
EVCacheClientSample.java in evcache-client-sample/src/main/java/com/netflix/evcache/sample	66	4	14	21	5
EVCacheValueSerde.java in evcache-core/src/main/java/com/netflix/evcache/pool	102	5	14	14	6
MetaArithmeticOperationImpl.java in evcache-core/src/main/java/net/spy/memcached/protocol/ascii	91	9	12	13	3
ZoneFallbackIterator.java in evcache-core/src/main/java/com/netflix/evcache/util	46	4	12	26	6
EVCacheTranscoderProperties.java in evcache-core/src/main/java/com/netflix/evcache/config	80	9	12	15	3
ThrottleListener.java in evcache-core/src/main/java/com/netflix/evcache/event/throttle	54	6	12	22	5
MetaDebugOperationImpl.java in evcache-core/src/main/java/net/spy/memcached/protocol/ascii	52	4	11	21	8
HashRingAlgorithm.java in evcache-core/src/main/java/com/netflix/evcache/pool	70	8	11	16	2

• 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.