• There are 152 files with units, with 13,109 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 1 complex files (McCabe index sum 126-250; 650 lines of code)
• 7 medium complex files (McCabe index sum 51-125; 2,566 lines of code)
• 22 slightly complex files (McCabe index sum 26-50; 4,077 lines of code)
• 122 simple files (McCabe index sum 1-25; 5,816 lines of code)
• 45 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
BaseLoadBalancer.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	650	65	154	24	17
LoadBalancerContext.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	491	38	124	25	16
RestClient.java in ribbon-httpclient/src/main/java/com/netflix/niws/client/http	530	26	117	22	37
LoadBalancerStats.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	321	40	70	22	7
ServerStats.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	330	52	64	19	4
DefaultClientConfigImpl.java in ribbon-archaius/src/main/java/com/netflix/client/config	291	62	63	22	2
ReloadableClientConfig.java in ribbon-core/src/main/java/com/netflix/client/config	345	34	59	17	12
LoadBalancerCommand.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/reactive	258	23	51	20	17
IClientConfig.java in ribbon-core/src/main/java/com/netflix/client/config	232	45	47	20	2
Server.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	181	30	46	25	7
DynamicServerListLoadBalancer.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	213	28	41	19	4
MethodTemplate.java in ribbon/src/main/java/com/netflix/ribbon/proxy	195	16	38	19	9
WeightedResponseTimeRule.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	181	14	36	20	13
ExecutionContextListenerInvoker.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/reactive	128	15	36	28	5
ClientFactory.java in ribbon-loadbalancer/src/main/java/com/netflix/client	169	13	34	20	5
LoadBalancingRxClient.java in ribbon-transport/src/main/java/com/netflix/ribbon/transport/netty	198	14	34	17	9
LoadBalancingHttpClient.java in ribbon-transport/src/main/java/com/netflix/ribbon/transport/netty/http	381	18	34	9	9
HttpRequestTemplate.java in ribbon/src/main/java/com/netflix/ribbon/http	220	29	34	15	5
AbstractServerPredicate.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	139	19	32	23	4
PrimeConnections.java in ribbon-loadbalancer/src/main/java/com/netflix/client	280	15	32	11	6
NFHttpClient.java in ribbon-httpclient/src/main/java/com/netflix/http4	237	23	32	14	3
DiscoveryEnabledNIWSServerList.java in ribbon-eureka/src/main/java/com/netflix/niws/loadbalancer	152	14	31	20	12
ResponseTimeWeightedRule.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	159	10	30	19	11
LoadBalancerBuilder.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	131	16	30	23	4
ClientException.java in ribbon-core/src/main/java/com/netflix/client	107	19	29	27	6
ZoneAwareLoadBalancer.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	146	10	27	18	8
ZoneAvoidanceRule.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	120	8	27	23	12
RibbonTransport.java in ribbon-transport/src/main/java/com/netflix/ribbon/transport/netty	196	27	27	14	1
EurekaNotificationServerListUpdater.java in ribbon-eureka/src/main/java/com/netflix/niws/loadbalancer	173	12	27	16	9
HttpRequest.java in ribbon-httpclient/src/main/java/com/netflix/client/http	139	23	26	19	3
RetryRule.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	66	10	24	36	10
HttpClientResponse.java in ribbon-httpclient/src/main/java/com/netflix/niws/client/http	131	16	22	17	6
ServerListSubsetFilter.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	120	6	21	18	12
HttpRequestBuilder.java in ribbon/src/main/java/com/netflix/ribbon/http	105	11	21	20	5
ZoneAffinityServerListFilter.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	94	6	20	21	8
HttpClientRequest.java in ribbon-httpclient/src/main/java/com/netflix/niws/client/http	102	18	20	20	3
CommonClientConfigKey.java in ribbon-core/src/main/java/com/netflix/client/config	170	10	19	11	5
PollingServerListUpdater.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	104	12	19	18	5
RibbonDynamicProxy.java in ribbon/src/main/java/com/netflix/ribbon/proxy	113	11	18	16	3
TemplateParser.java in ribbon/src/main/java/com/netflix/ribbon/template	81	4	18	22	9
NamedConnectionPool.java in ribbon-httpclient/src/main/java/com/netflix/http4	140	17	18	13	2
ConnectionPoolCleaner.java in ribbon-httpclient/src/main/java/com/netflix/http4	87	13	18	21	5
EvCacheProvider.java in ribbon-evcache/src/main/java/com/netflix/ribbon/evache	109	6	18	17	7
MethodTemplateExecutor.java in ribbon/src/main/java/com/netflix/ribbon/proxy	103	8	17	17	7
ClientOptions.java in ribbon/src/main/java/com/netflix/ribbon	75	15	17	23	3
PingUrl.java in ribbon-httpclient/src/main/java/com/netflix/loadbalancer	83	10	17	20	6
RoundRobinRule.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer	64	5	16	25	10
AbstractLoadBalancerAwareClient.java in ribbon-loadbalancer/src/main/java/com/netflix/client	90	9	16	18	4
ClientRequest.java in ribbon-core/src/main/java/com/netflix/client	72	14	15	21	2
ExecutionContext.java in ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/reactive	84	10	15	18	4

• 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.