elastic / apm-server - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 931 units with 14,800 lines of code in units (66.0% of code).

0 very complex units (0 lines of code)
3 complex units (571 lines of code)
32 medium complex units (1,666 lines of code)
119 simple units (3,881 lines of code)
777 very simple units (8,682 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
func() in x-pack/apm-server/sampling/processor.go	172	37	1
func() in internal/beater/beater.go	275	35	1
func() in internal/beatcmd/beat.go	124	30	1
func Run() in systemtest/benchtest/main.go	80	21	1
func() in systemtest/apmservertest/server.go	59	21	1
func addKey() in internal/beatcmd/keystore_nofips.go	64	18	4
func Main() in systemtest/cmd/runapm/main.go	77	18	0
func assertOtelMetrics() in internal/beater/monitoringtest/opentelemetry.go	60	17	5
func addDocappenderLibbeatOutputMetrics() in internal/beatcmd/beat.go	53	16	3
func resolveMappings() in internal/r8/deobfuscator.go	54	15	2
func flattenAndClean() in internal/kibana/send_config.go	44	15	1
func addMetric() in internal/telemetry/metric_exporter.go	65	15	2
func() in internal/beater/beater.go	59	14	1
func generateCerts() in systemtest/apmservertest/server.go	64	14	4
func matchAgentConfig() in internal/agentcfg/fetch.go	37	13	2
func() in internal/beatcmd/beat.go	60	13	1
func() in internal/beatcmd/reloader.go	66	13	1
func() in internal/telemetry/metric_exporter.go	56	13	1
func() in internal/sourcemap/elasticsearch.go	42	13	1
func() in systemtest/containers.go	54	13	1
func() in internal/beatcmd/beat.go	49	12	1
func LoadConfig() in internal/beatcmd/config.go	48	12	1
func SetClientMetadata() in internal/beater/otlp/clientmetadata.go	32	12	2
func() in x-pack/apm-server/sampling/pubsub/pubsub.go	49	12	1
func() in functionaltests/internal/ecclient/client.go	58	12	1
func Main() in systemtest/cmd/sendotlp/main.go	62	12	2
func() in internal/agentcfg/elasticsearch.go	46	11	1
func setLabel() in internal/telemetry/metric_exporter.go	30	11	3
func newInstrumentation() in internal/beater/beater.go	59	11	2
func() in internal/beater/config/rum.go	32	11	1
func() in internal/beater/auth/authenticator.go	30	11	1
func parseForwarded() in internal/netutil/netutil.go	37	11	1
func getGlobalCheckpoints() in x-pack/apm-server/sampling/pubsub/checkpoints.go	42	11	3
func() in functionaltests/internal/ecclient/client.go	43	11	1
func() in systemtest/apmservertest/server.go	55	11	1
func addDocappenderOutputElasticsearchMetrics() in internal/beatcmd/beat.go	35	10	3
func() in internal/sourcemap/metadata_fetcher.go	40	10	1
func() in internal/sourcemap/processor.go	50	10	1
func() in internal/beater/auth/anonymous.go	30	10	1
func() in internal/beater/request/context.go	40	10	1
func processStreamError() in internal/beater/api/intake/handler.go	35	10	1
func() in x-pack/apm-server/sampling/processor.go	39	10	1
func() in x-pack/apm-server/sampling/pubsub/pubsub.go	71	10	1
func NewUnstartedElasticAgentContainer() in systemtest/containers.go	55	10	1
func() in internal/agentcfg/elasticsearch.go	43	9	1
func logSystemInfo() in internal/beatcmd/beat.go	50	9	1
func buildLoggingConfig() in internal/beatcmd/logging.go	25	9	5
func NewClientParams() in internal/elasticsearch/client.go	43	9	1
func() in internal/sourcemap/sourcemap_fetcher.go	33	9	1
func() in internal/sourcemap/metadata_fetcher.go	37	9	1