• There are 124 files with units, with 9,311 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)
• 3 medium complex files (McCabe index sum 51-125; 983 lines of code)
• 15 slightly complex files (McCabe index sum 26-50; 2,934 lines of code)
• 106 simple files (McCabe index sum 1-25; 5,394 lines of code)
• 39 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
StatsMonitor.java in servo-core/src/main/java/com/netflix/servo/monitor	381	38	65	17	9
Monitors.java in servo-core/src/main/java/com/netflix/servo/monitor	251	30	61	24	8
ThreadCpuStats.java in servo-core/src/main/java/com/netflix/servo/util	351	29	54	15	10
AtlasMetricObserver.java in servo-atlas/src/main/java/com/netflix/servo/publish/atlas	320	30	50	16	4
JmxMetricPoller.java in servo-core/src/main/java/com/netflix/servo/publish	228	16	46	20	6
SpectatorContext.java in servo-core/src/main/java/com/netflix/servo	330	25	45	14	7
SmallTagMap.java in servo-core/src/main/java/com/netflix/servo/tag	194	22	43	22	6
StatsConfig.java in servo-core/src/main/java/com/netflix/servo/stats	163	24	42	26	12
ApacheStatusPoller.java in servo-apache/src/main/java/com/netflix/servo/publish/apache	173	11	34	20	12
MonitorConfig.java in servo-core/src/main/java/com/netflix/servo/monitor	126	22	31	25	6
NormalizationTransform.java in servo-core/src/main/java/com/netflix/servo/publish	166	15	31	19	7
JvmMetricPoller.java in servo-core/src/main/java/com/netflix/servo/publish	359	14	30	8	12
BasicTagList.java in servo-core/src/main/java/com/netflix/servo/tag	113	22	30	27	3
BucketTimer.java in servo-core/src/main/java/com/netflix/servo/monitor	170	15	29	17	10
TomcatPoller.java in servo-tomcat/src/main/java/com/netflix/servo/publish/tomcat	145	10	28	19	7
StatsBuffer.java in servo-core/src/main/java/com/netflix/servo/stats	141	15	28	20	5
CloudWatchMetricObserver.java in servo-aws/src/main/java/com/netflix/servo/publish/cloudwatch	158	14	27	17	6
MonitorRegistryMetricPoller.java in servo-core/src/main/java/com/netflix/servo/publish	148	13	26	18	4
BasicTimer.java in servo-core/src/main/java/com/netflix/servo/monitor	132	16	25	19	8
GraphiteMetricObserver.java in servo-graphite/src/main/java/com/netflix/servo/publish/graphite	122	9	24	20	4
DurationTimer.java in servo-core/src/main/java/com/netflix/servo/monitor	128	15	24	19	6
DynamicTimer.java in servo-core/src/main/java/com/netflix/servo/monitor	119	18	23	19	5
ValidCharacters.java in servo-atlas/src/main/java/com/netflix/servo/publish/atlas	91	9	22	24	5
SortedTagList.java in servo-core/src/main/java/com/netflix/servo/tag	96	17	22	23	2
BucketConfig.java in servo-core/src/main/java/com/netflix/servo/monitor	89	9	21	24	8
BasicDistributionSummary.java in servo-core/src/main/java/com/netflix/servo/monitor	98	11	20	20	8
AwsInjectableTag.java in servo-aws/src/main/java/com/netflix/servo/tag/aws	118	14	20	17	4
ExpiringCache.java in servo-core/src/main/java/com/netflix/servo/util	104	12	18	17	5
CounterToRateMetricTransform.java in servo-core/src/main/java/com/netflix/servo/publish	119	11	18	15	5
Main.java in servo-example/src/main/java/com/netflix/servo/example	105	11	17	16	5
HttpHelper.java in servo-atlas/src/main/java/com/netflix/servo/publish/atlas	153	7	17	11	5
MinGauge.java in servo-core/src/main/java/com/netflix/servo/monitor	61	8	17	28	5
PeakRateCounter.java in servo-core/src/main/java/com/netflix/servo/monitor	77	9	17	22	5
BasicGraphiteNamingConvention.java in servo-graphite/src/main/java/com/netflix/servo/publish/graphite	77	5	16	21	5
MaxGauge.java in servo-core/src/main/java/com/netflix/servo/monitor	72	9	16	22	5
StepCounter.java in servo-core/src/main/java/com/netflix/servo/monitor	72	11	16	22	5
DoubleMaxGauge.java in servo-core/src/main/java/com/netflix/servo/monitor	72	9	16	22	5
MonitorMBean.java in servo-core/src/main/java/com/netflix/servo/jmx	101	12	16	16	3
JmxMonitorRegistry.java in servo-core/src/main/java/com/netflix/servo/jmx	100	7	16	16	4
AsyncMetricObserver.java in servo-core/src/main/java/com/netflix/servo/publish	99	9	16	16	4
DoubleCounter.java in servo-core/src/main/java/com/netflix/servo/monitor	76	8	15	20	5
UpdateRequest.java in servo-atlas/src/main/java/com/netflix/servo/publish/atlas	66	7	14	21	4
NumberGauge.java in servo-core/src/main/java/com/netflix/servo/monitor	60	9	14	23	4
Metric.java in servo-core/src/main/java/com/netflix/servo	53	10	14	26	5
AtlasPrettyPrinter.java in servo-atlas/src/main/java/com/netflix/servo/publish/atlas	55	10	13	24	2
StatsTimer.java in servo-core/src/main/java/com/netflix/servo/monitor	59	11	13	22	3
Config.java in servo-example/src/main/java/com/netflix/servo/example	60	12	12	20	1
BasicInformational.java in servo-core/src/main/java/com/netflix/servo/monitor	41	6	12	29	6
DynamicCounter.java in servo-core/src/main/java/com/netflix/servo/monitor	82	10	12	15	3
DoubleGauge.java in servo-core/src/main/java/com/netflix/servo/monitor	57	8	12	21	5

• 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.