twitter / finagleConditional 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 5,020 units with 52,771 lines of code in units (59.1% of code).

3 very complex units (221 lines of code)
8 complex units (550 lines of code)
94 medium complex units (4,018 lines of code)
338 simple units (7,790 lines of code)
4,577 very simple units (40,192 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
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	87	69	1
def fromCode() in finagle-base-http/src/main/scala/com/twitter/finagle/http/Status.scala	63	60	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Span.java	71	53	1
def apply() in finagle-memcached/src/main/scala/com/twitter/finagle/memcached/Interpreter.scala	129	41	1
public int compareTo() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	107	32	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/BinaryAnnotation.java	39	31	1
def record() in finagle-zipkin-core/src/main/scala/com/twitter/finagle/zipkin/core/RawZipkinTracer.scala	102	29	1
private[mysql] def getCode() in finagle-mysql/src/main/scala/com/twitter/finagle/mysql/Type.scala	27	29	1
private[mysql] def getCodeString() in finagle-mysql/src/main/scala/com/twitter/finagle/mysql/Type.scala	30	29	1
def apply() in finagle-serversets/src/main/scala/com/twitter/finagle/serverset2/client/apache/ApacheKeeperException.scala	29	28	2
public int compareTo() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Span.java	87	26	1
def isNull() in finagle-mysql/src/main/scala/com/twitter/finagle/mysql/BinaryEncodedRow.scala	38	25	1
public void read() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	121	25	2
def decode[M <: BackendMessage]() in finagle-postgresql/src/main/scala/com/twitter/finagle/postgresql/transport/MessageDecoder.scala	36	24	1
def simplify[T]() in finagle-core/src/main/scala/com/twitter/finagle/NameTree.scala	38	23	1
private def showParens[T: Showable]() in finagle-core/src/main/scala/com/twitter/finagle/NameTree.scala	39	23	1
def doAuth() in finagle-mysql/src/main/scala/com/twitter/finagle/mysql/AuthNegotiation.scala	56	23	2
public void write() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	77	23	2
def apply[M M): MessageDecoder[M] = reader => f() in finagle-postgresql/src/main/scala/com/twitter/finagle/postgresql/transport/MessageDecoder.scala	36	23	1
public static boolean isRetryable() in finagle-serversets/src/main/java/com/twitter/finagle/common/zookeeper/ZooKeeperUtils.java	29	22	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Annotation.java	31	22	1
def preprocess() in finagle-core/src/main/scala/com/twitter/finagle/service/FailFastFactory.scala	50	21	1
def of() in finagle-mysql/src/main/scala/com/twitter/finagle/mysql/Parameter.scala	23	21	1
public void setFieldValue() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	74	21	2
public void read() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Span.java	104	21	2
override def receive() in finagle-postgresql/src/main/scala/com/twitter/finagle/postgresql/machine/ExecuteMachine.scala	52	21	2
private[this] def inMegabytes() in finagle-stats-core/src/main/scala/com/twitter/finagle/stats/StatsFormatter.scala	29	21	1
private def bind() in finagle-core/src/main/scala/com/twitter/finagle/Namer.scala	44	20	3
def streamOut() in finagle-netty4-http/src/main/scala/com/twitter/finagle/netty4/http/Netty4StreamTransport.scala	63	20	4
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Endpoint.java	31	20	1
public void write() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Span.java	65	19	2
def write[T]() in finagle-postgresql/src/it/scala/com/twitter/finagle/postgresql/PreparedStatementSpec.scala	114	19	2
public int hashCode() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestHeader.java	30	18	0
def main() in finagle-benchmark/src/main/scala/com/twitter/finagle/balancersim/Simulation.scala	150	18	0
def bound() in finagle-core/src/main/scala/com/twitter/finagle/Name.scala	28	17	1
def apply() in finagle-core/src/main/scala/com/twitter/finagle/addr/StabilizingAddr.scala	69	17	5
private[this] def intToUtf8() in finagle-memcached/src/main/scala/com/twitter/finagle/memcached/protocol/text/client/CommandToBuf.scala	48	17	1
def encodeString() in finagle-mux/src/main/scala/com/twitter/finagle/mux/transport/Message.scala	47	17	1
def decodeMessageBody() in finagle-mux/src/main/scala/com/twitter/finagle/mux/transport/Message.scala	26	17	3
private[this] def handleProcessMessage() in finagle-mux/src/main/scala/com/twitter/finagle/mux/pushsession/MuxClientSession.scala	45	17	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/RequestContext.java	23	17	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Delegation.java	23	17	1
public boolean equals() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/ResponseHeader.java	23	17	1
public void setFieldValue() in finagle-thrift/src/main/java/com/twitter/finagle/thrift/thrift/Span.java	60	17	2
def escape() in finagle-http/src/main/scala/com/twitter/finagle/http/filter/LoggingFilter.scala	40	17	1
private def commaSeparatedGlob() in finagle-benchmark/src/main/scala/com/twitter/finagle/stats/GlobBenchmark.scala	26	17	1
private[this] def extractMatchingParameterValues() in finagle-http/src/main/scala/com/twitter/finagle/http/exp/routing/PathMatcher.scala	47	16	5
override def receive() in finagle-postgresql/src/main/scala/com/twitter/finagle/postgresql/machine/HandshakeMachine.scala	53	16	2
def withMaxSyncConcurrency() in finagle-exp/src/main/scala/com/twitter/finagle/exp/fiber_scheduler/fiber/Group.scala	58	16	4
def apply[Key, Req, Rep]() in finagle-core/src/main/scala/com/twitter/finagle/naming/NameTreeFactory.scala	53	15	6