guardian / frontend - 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 3,158 units with 40,506 lines of code in units (25.9% of code).

1 very complex units (519 lines of code)
4 complex units (270 lines of code)
70 medium complex units (2,859 lines of code)
207 simple units (5,598 lines of code)
2,876 very simple units (31,260 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
def make() in common/app/model/dotcomrendering/pageElements/PageElement.scala	519	64	11
def isSupported() in common/app/model/dotcomrendering/pageElements/PageElement.scala	48	46	1
def make() in common/app/model/liveblog/BlockElement.scala	75	30	1
def makeFront() in common/app/services/IndexPage.scala	118	27	2
def getComponentId() in common/app/navigation/helpers/UrlHelpers.scala	29	26	2
private def isSupported() in applications/app/controllers/ImageContentController.scala	63	23	1
private def apidToUuid() in common/app/model/Section.scala	25	23	1
prerender() in static/src/javascripts/projects/common/modules/discussion/comment-box.js	55	22	0
def fromFapiContentFormat() in common/app/model/meta.scala	32	22	1
private def resultWithVaryHeader() in facia/app/controllers/FaciaController.scala	95	22	2
initMainComments() in static/src/javascripts/projects/common/modules/discussion/loader.js	87	21	0
function f() in admin/conf/resources/r2/interactiveSwfScript.js	55	21	0
function y() in admin/conf/resources/r2/interactiveSwfScript.js	45	21	3
override def reads() in common/app/model/Formats.scala	23	21	1
def getParameter() in common/app/implicits/Requests.scala	43	20	1
def clean() in common/app/views/support/HtmlCleaner.scala	55	20	1
override def writes() in common/app/model/Formats.scala	22	20	1
function U() in admin/conf/resources/r2/interactiveSwfScript.js	27	19	4
constructor() in static/src/javascripts/projects/common/modules/navigation/search.js	116	18	0
postComment() in static/src/javascripts/projects/common/modules/discussion/comment-box.js	95	17	0
var p = function() in admin/conf/resources/r2/interactiveSwfScript.js	44	17	0
override def reads() in common/app/model/DotcomContentType.scala	19	17	1
def codeFor() in sport/app/football/model/GuTeamCode.scala	20	17	1
fetchComments() in static/src/javascripts/projects/common/modules/discussion/comments.js	62	16	1
e() in admin/conf/resources/r2/interactiveSwfScript.js	36	16	1
def extractErrorFromResponse() in identity/app/idapiclient/parser/JsonBodyParser.scala	46	15	2
constructor() in static/src/javascripts/projects/common/modules/ui/message.js	20	15	2
function k() in admin/conf/resources/r2/interactiveSwfScript.js	34	15	4
def fromTrail() in common/app/layout/SnapStuff.scala	26	15	1
def reads() in common/app/model/Formats.scala	18	15	1
override def writes() in common/app/common/commercial/EditionAdTargeting.scala	25	15	1
onKeyDown() in static/src/javascripts/projects/common/modules/crosswords/crossword.js	38	14	1
onSelect() in static/src/javascripts/projects/common/modules/crosswords/crossword.js	38	14	2
show() in static/src/javascripts/projects/common/modules/ui/message.js	83	14	1
(function (documentElement, window, navigator)() in common/app/templates/inlineJS/blocking/applyRenderConditions.scala.js	42	14	3
def make() in common/app/model/CardStyle.scala	16	14	1
def writes() in common/app/model/Formats.scala	16	14	1
def writes() in common/app/model/Formats.scala	36	14	1
def apply() in common/app/model/content.scala	11	14	1
def fromPressedCollection() in common/app/common/commercial/ContainerModel.scala	39	14	1
private def render() in article/app/controllers/ArticleController.scala	38	13	3
private def redirectForPath() in archive/app/controllers/ArchiveController.scala	14	13	1
private def logAround[T]() in admin/app/dfp/SessionLogger.scala	58	13	3
override protected def standardSlices() in common/app/layout/slices/DynamicSlowMpu.scala	11	13	2
def all() in common/app/layout/slices/Container.scala	35	13	1
protected def standardSlices() in common/app/layout/slices/DynamicFast.scala	35	13	2
def forCategory() in common/app/views/support/ImageProfile.scala	25	13	3
def findBreakpointWidths() in common/app/views/support/HtmlCleaner.scala	10	13	1
override def clean() in common/app/views/support/HtmlCleaner.scala	39	13	1
def fromFaciaContentAndCardType() in common/app/model/FaciaDisplayElement.scala	22	13	2