apache / trafficserver - 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 2,221 units with 14,657 lines of code in units (4.3% of code).

1 very complex units (178 lines of code)
1 complex units (59 lines of code)
50 medium complex units (2,253 lines of code)
101 simple units (2,826 lines of code)
2,068 very simple units (9,341 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
std::string ScanScalar() in lib/yamlcpp/src/scanscalar.cpp	178	75	2
void Scanner::ScanNextToken() in lib/yamlcpp/src/scanner.cpp	59	28	0
std::string Escape() in lib/yamlcpp/src/exp.cpp	53	24	1
bool Wamr::link() in plugins/experimental/wasm/lib/src/wamr/wamr.cc	115	22	1
def main() in plugins/experimental/uri_signing/python_signer/uri_signer.py	73	21	0
bool V8::link() in plugins/experimental/wasm/lib/src/v8/v8.cc	102	21	1
bool Wasmtime::link() in plugins/experimental/wasm/lib/src/wasmtime/wasmtime.cc	113	21	1
bool IsAnchorChar() in lib/yamlcpp/src/emitterutils.cpp	39	21	1
void SingleDocParser::HandleNode() in lib/yamlcpp/src/singledocparser.cpp	80	20	1
Pairs PairsUtil::toPairs() in plugins/experimental/wasm/lib/src/pairs_util.cc	67	18	1
bool BytecodeUtil::getAbiVersion() in plugins/experimental/wasm/lib/src/bytecode_util.cc	59	18	2
def __generate_code() in doc/ext/traffic-server.cmake.in.py	46	17	4
def run() in doc/ext/traffic-server.cmake.in.py	61	17	1
def __generate_code() in doc/ext/traffic-server.py	46	17	4
def run() in doc/ext/traffic-server.py	61	17	1
int main() in lib/yamlcpp/util/read.cpp	59	17	2
def run() in doc/ext/traffic-server.cmake.in.py	51	16	1
def run() in doc/ext/traffic-server.py	51	16	1
bool WasmBase::load() in plugins/experimental/wasm/lib/src/wasm.cc	60	15	2
bool BytecodeUtil::getFunctionNameIndex() in plugins/experimental/wasm/lib/src/bytecode_util.cc	52	15	2
bool WriteDoubleQuotedString() in lib/yamlcpp/src/emitterutils.cpp	46	15	3
def traverse() in doc/ext/doxygen.py	42	14	3
void Emitter::BlockSeqPrepareNode() in lib/yamlcpp/src/emitter.cpp	30	14	1
void Scanner::ScanBlockScalar() in lib/yamlcpp/src/scantoken.cpp	42	14	0
bool WriteChar() in lib/yamlcpp/src/emitterutils.cpp	26	14	3
def handle_file_input() in tools/records/convert2yaml.py	37	13	1
sub compareHeaderValues() in tools/compare_servers.pl	44	13	0
bool BytecodeUtil::getStrippedSource() in plugins/experimental/wasm/lib/src/bytecode_util.cc	42	13	2
void Emitter::BlockMapPrepareLongKey() in lib/yamlcpp/src/emitter.cpp	31	13	1
int Utf8BytesIndicated() in lib/yamlcpp/src/emitterutils.cpp	23	13	1
bool GetNextCodePointAndAdvance() in lib/yamlcpp/src/emitterutils.cpp	36	13	3
def get_value() in tools/records/convert2yaml.py	18	12	2
void inline invokePluginForEvent() in src/tscpp/api/utils_internal.cc	45	12	3
def run() in doc/ext/extras/txnbox.cmake.in.py	49	12	1
bool PairsUtil::marshalPairs() in plugins/experimental/wasm/lib/src/pairs_util.cc	51	12	3
def verify_transaction() in plugins/traffic_dump/post_process.py	22	12	2
void Emitter::PrepareTopNode() in lib/yamlcpp/src/emitter.cpp	21	12	1
void Emitter::FlowSeqPrepareNode() in lib/yamlcpp/src/emitter.cpp	28	12	1
void Emitter::FlowMapPrepareLongKey() in lib/yamlcpp/src/emitter.cpp	28	12	1
void Emitter::FlowMapPrepareSimpleKey() in lib/yamlcpp/src/emitter.cpp	28	12	1
void Emitter::FlowMapPrepareSimpleKeyValue() in lib/yamlcpp/src/emitter.cpp	28	12	1
def print_class() in tools/cripts/genconfig.py	31	11	3
def run() in doc/ext/extras/txnbox.cmake.in.py	35	11	1
def parse_records_file() in contrib/python/compare_records_config.py	25	11	1
bool WasmEdge::link() in plugins/experimental/wasm/lib/src/wasmedge/wasmedge.cc	45	11	1
bool BytecodeUtil::getCustomSection() in plugins/experimental/wasm/lib/src/bytecode_util.cc	35	11	3
void Emitter::FlowMapPrepareLongKeyValue() in lib/yamlcpp/src/emitter.cpp	25	11	1
void Emitter::BlockMapPrepareLongKeyValue() in lib/yamlcpp/src/emitter.cpp	26	11	1
void Emitter::BlockMapPrepareSimpleKey() in lib/yamlcpp/src/emitter.cpp	24	11	1
void Stream::StreamInUtf16() in lib/yamlcpp/src/stream.cpp	43	11	0