twitter / twitter-serverConditional 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 255 units with 3,480 lines of code in units (51.3% of code).

0 very complex units (0 lines of code)
0 complex units (0 lines of code)
5 medium complex units (324 lines of code)
21 simple units (655 lines of code)
229 very simple units (2,501 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
private def renderHtml() in logback-classic/src/main/scala/com/twitter/server/handler/logback/classic/LoggingHandler.scala	90	13	4
private def respond() in logback-classic/src/main/scala/com/twitter/server/handler/logback/classic/LoggingHandler.scala	54	12	1
private[this] def midPoint() in server/src/main/scala/com/twitter/server/handler/HistogramQueryHandler.scala	51	11	1
def render() in server/src/main/scala/com/twitter/server/view/IndexView.scala	82	11	4
private def respond() in slf4j-log4j12/src/main/scala/com/twitter/server/handler/slf4j/log4j12/LoggingHandler.scala	47	11	1
private[server] def translateToQuery() in server/src/main/scala/com/twitter/server/handler/MetricExpressionHandler.scala	19	10	5
private[handler] def parsePath() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	23	9	2
def apply() in server/src/main/scala/com/twitter/server/handler/ServerRegistryHandler.scala	30	9	1
def apply() in server/src/main/scala/com/twitter/server/handler/TracingHandler.scala	43	9	1
def apply() in server/src/main/scala/com/twitter/server/handler/TunableHandler.scala	28	9	1
private def getMetric() in server/src/main/scala/com/twitter/server/handler/MetricExpressionHandler.scala	18	8	4
private[this] def filterRegistry() in server/src/main/scala/com/twitter/server/handler/RegistryHandler.scala	29	8	1
def escapeHtml() in server/src/main/scala/com/twitter/server/util/HtmlUtils.scala	16	8	1
private[handler] def toLibraries() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	26	7	1
def apply() in server/src/main/scala/com/twitter/server/handler/HeapResourceHandler.scala	25	7	1
private[this] def handlePut() in server/src/main/scala/com/twitter/server/handler/TunableHandler.scala	21	7	1
private[this] def handleDelete() in server/src/main/scala/com/twitter/server/handler/TunableHandler.scala	21	7	1
def render() in server/src/main/scala/com/twitter/server/view/EndpointRegistryView.scala	41	7	3
def run() in doc/src/sphinx/exts/includecode.py	102	7	1
MsToStringConverter.prototype.convert = function() in server/src/main/resources/twitter-server/js/utils.js	13	6	1
private[handler] def setToggle() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	26	6	3
def apply() in server/src/main/scala/com/twitter/server/handler/ProfileResourceHandler.scala	29	6	1
private def htmlResponse() in server/src/main/scala/com/twitter/server/handler/ThreadsHandler.scala	22	6	1
def apply() in server/src/main/scala/com/twitter/server/handler/ClientRegistryHandler.scala	36	6	1
protected def getGraceParam() in server/src/main/scala/com/twitter/server/handler/ShutdownHandler.scala	51	6	1
private def row() in server/src/main/scala/com/twitter/server/view/ThreadsView.scala	36	6	1
private[this] def resolvers = resolverMap() in server/src/main/scala/com/twitter/server/FlagResolver.scala	12	5	0
def this() in server/src/main/scala/com/twitter/server/handler/ResourceHandler.scala	11	5	2
def this() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	18	5	0
private[this] def applyPut() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	17	5	1
private[this] def applyDelete() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	17	5	1
def apply() in server/src/main/scala/com/twitter/server/handler/MetricExpressionHandler.scala	29	5	1
private[handler] def jsonMapFromRules() in server/src/main/scala/com/twitter/server/handler/LintHandler.scala	32	5	1
def prettyRate() in server/src/main/scala/com/twitter/server/handler/ClientRegistryHandler.scala	9	5	1
def this() in server/src/main/scala/com/twitter/server/handler/TunableHandler.scala	23	5	0
def adminRoutes() in server/src/main/scala/com/twitter/server/Admin.scala	267	5	2
def compare() in server/src/main/scala/com/twitter/server/view/IndexView.scala	6	5	2
def apply() in slf4j-jdk14/src/main/scala/com/twitter/server/handler/slf4j/jdk14/LoggingHandler.scala	33	5	1
override def format() in slf4j-jdk14/src/main/scala/com/twitter/server/logging/LogFormatter.scala	26	5	1
function extractParameters() in server/src/main/resources/twitter-server/js/histogram-dom.js	13	4	1
xhttp.onreadystatechange = function() in server/src/main/resources/twitter-server/js/histogram-main.js	7	4	0
BytesToStringConverter.prototype.convert = function() in server/src/main/resources/twitter-server/js/utils.js	6	4	1
function pretty() in server/src/main/resources/twitter-server/js/summary.js	6	4	2
$() in server/src/main/resources/twitter-server/js/threads.js	11	4	1
private[this] def query() in server/src/main/scala/com/twitter/server/handler/MetricMetadataQueryHandler.scala	16	4	1
private[this] def toLibraryToggles() in server/src/main/scala/com/twitter/server/handler/ToggleHandler.scala	20	4	1
def apply() in server/src/main/scala/com/twitter/server/handler/LintHandler.scala	14	4	1
def this() in server/src/main/scala/com/twitter/server/handler/AdminRedirectHandler.scala	16	4	0
def apply() in server/src/main/scala/com/twitter/server/handler/ContentionHandler.scala	22	4	1
def apply() in server/src/main/scala/com/twitter/server/handler/ThreadsHandler.scala	17	4	1