elastic / apm-agent-go - 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 1,168 units with 16,017 lines of code in units (79.3% of code).

1 very complex units (412 lines of code)
11 complex units (1,174 lines of code)
51 medium complex units (2,841 lines of code)
126 simple units (3,721 lines of code)
979 very simple units (7,869 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 tracer.go	412	110	1
func() in tracer.go	178	39	1
func() in config.go	192	39	1
func() in sqlutil/scanner.go	87	38	1
func QuerySignature() in module/apmsql/signature.go	113	37	1
func querySignature() in module/apmgocql/signature.go	100	36	1
func() in model/marshal_fastjson.go	96	36	1
func() in model/marshal_fastjson.go	94	35	1
func() in module/apmotel/span.go	98	27	1
func() in model/marshal_fastjson.go	97	27	1
func() in model/marshal_fastjson.go	60	27	1
func() in internal/wildcard/matcher.go	59	26	1
func() in model/marshal_fastjson.go	79	25	1
func() in model/marshal_fastjson.go	79	25	1
func() in span.go	87	25	1
func() in module/apmprometheus/gatherer.go	80	24	1
func() in module/apmotel/span.go	66	24	1
func() in error.go	80	23	1
func() in module/apmot/span.go	65	21	1
func() in model/marshal_fastjson.go	70	21	1
func() in transaction.go	109	21	1
func() in model/marshal_fastjson.go	56	20	1
func() in module/apmot/span.go	73	19	1
func() in model/marshal_fastjson.go	80	19	1
func() in model/marshal_fastjson.go	58	19	1
func() in module/apmotel/gatherer.go	42	18	1
func() in model/marshal.go	86	18	1
func main() in scripts/genmod/main.go	60	17	0
func() in module/apmzerolog/writer.go	53	16	1
func() in module/apmazure/blob.go	36	16	1
func ParseTraceparentHeader() in module/apmhttp/traceheaders.go	55	16	1
func() in module/apmecho/middleware.go	63	15	1
func() in module/apmechov4/middleware.go	63	15	1
func() in model/marshal_fastjson.go	61	15	1
func() in model/marshal_fastjson.go	40	15	1
func() in modelwriter.go	82	15	1
func getKubernetesMetadata() in utils.go	37	15	0
func() in span.go	62	15	1
func() in module/apmslog/handler.go	64	14	1
func() in module/apmot/tracer.go	52	14	1
func captureSearchStatement() in module/apmelasticsearch/client.go	53	14	1
func main() in scripts/gendockerfile.go	50	14	0
func() in transport/transporttest/recorder.go	46	14	1
func ParseSize() in internal/configutil/size.go	41	13	1
func() in model/marshal_fastjson.go	51	13	1
func() in context.go	46	13	1
func() in module/apmazure/blob.go	28	12	1
func() in module/apmfiber/middleware.go	48	11	1
func() in module/apmsql/conn.go	20	11	1
func withClientTrace() in module/apmhttp/clienttrace.go	76	11	3