JetBrains / bun 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 8,214 units with 96,126 lines of code in units (21.3% of code).

18 very complex units (5,053 lines of code)
61 complex units (6,876 lines of code)
302 medium complex units (15,178 lines of code)
603 simple units (16,140 lines of code)
7,230 very simple units (52,879 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
bool Bun__deepEquals() in src/bun.js/bindings/bindings.cpp	475	168	8
static void onDidChangeListeners() in src/bun.js/bindings/BunProcess.cpp	1463	148	3
Url.prototype.resolveObject = function() in src/js/node/url.ts	208	103	1
Url.prototype.resolveObject = function() in src/node-fallbacks/url.js	185	103	1
JSValue readTerminal() in src/bun.js/bindings/webcore/SerializedScriptValue.cpp	321	87	0
static void JSC__JSValue__forEachPropertyImpl() in src/bun.js/bindings/bindings.cpp	176	73	4
AsymmetricMatcherResult matchAsymmetricMatcherAndGetFlags() in src/bun.js/bindings/bindings.cpp	206	68	5
function eos() in src/js/node/stream.ts	167	66	3
Url.prototype.parse = function() in src/js/node/url.ts	177	65	3
Url.prototype.parse = function() in src/node-fallbacks/url.js	164	65	3
var parse = function() in src/js/node/querystring.ts	130	61	4
bool dumpIfTerminal() in src/bun.js/bindings/webcore/SerializedScriptValue.cpp	297	61	2
export function parseTest() in packages/bun-internal-test/runners/bun/runner.ts	240	58	2
function createErrDiff() in src/js/node/assert.ts	235	57	3
constructor() in src/js/node/http.ts	159	56	3
function loadOptions() in src/js/bun/sql.ts	54	54	1
SerializationReturnCode CloneSerializer::serialize() in src/bun.js/bindings/webcore/SerializedScriptValue.cpp	240	51	1
void us_internal_dispatch_ready_poll() in packages/bun-usockets/src/loop.c	156	51	3
constructor() in src/js/node/wasi.ts	321	48	1
static bool handleFragment() in packages/bun-uws/src/WebSocketContext.h	139	48	7
static ReturnType convert() in src/bun.js/bindings/webcore/JSDOMConvertUnion.h	122	47	2
function pipelineImpl() in src/js/node/stream.ts	134	45	3
static void fromErrorInstance() in src/bun.js/bindings/bindings.cpp	147	44	5
async function processFileSplit() in src/codegen/bundle-functions.ts	184	42	1
Readable.prototype.read = function() in src/js/node/stream.ts	90	40	1
template JsonWebKey convertDictionary() in src/bun.js/bindings/webcrypto/JSJsonWebKey.cpp	214	40	2
void populateESMExports() in src/bun.js/bindings/CommonJSModuleRecord.cpp	108	40	5
WTF::String Bun::formatStackTrace() in src/bun.js/bindings/ZigGlobalObject.cpp	159	40	10
void CryptoAlgorithmRSA_OAEP::importKey() in src/bun.js/bindings/webcrypto/CryptoAlgorithmRSA_OAEP.cpp	80	39	7
static inline JSC::EncodedJSValue createJSBufferFromJS() in src/bun.js/bindings/JSBuffer.cpp	123	38	3
export async function bundleBuiltinFunctions() in src/codegen/bundle-functions.ts	329	38	1
static JSC::JSValue toJS() in src/bun.js/bindings/SQLClient.cpp	139	37	3
static JSC::JSValue rebindObject() in src/bun.js/bindings/sqlite/JSSQLStatement.cpp	120	37	8
export function runOnResolvePlugins() in src/js/builtins/BundlerPlugin.ts	90	36	6
RefPtr CryptoKeyRSA::importJwk() in src/bun.js/bindings/webcrypto/CryptoKeyRSA.cpp	77	36	5
function encodeTransformOptions() in src/api/schema.js	172	36	2
function AssertionError2() in src/js/node/assert.ts	122	35	1
export function getEventSource() in src/js/builtins/EventSource.ts	184	35	0
static EncodedJSValue doAsymmetricCipher() in src/bun.js/bindings/KeyObject.cpp	118	35	3
template JSC::EncodedJSValue JSC_HOST_CALL_ATTRIBUTES JSWorkerDOMConstructor::construct() in src/bun.js/bindings/webcore/JSWorker.cpp	141	35	2
DeserializationResult CloneDeserializer::deserialize() in src/bun.js/bindings/webcore/SerializedScriptValue.cpp	174	35	0
WriteStream.prototype.getColorDepth = function() in src/js/node/tty.ts	86	34	1
JSValue convertToJSValue() in src/bun.js/bindings/webcore/JSDOMConvertWebGL.cpp	73	34	3
function decodeTransformOptions() in src/api/schema.js	98	34	1
function exceptionToMarkdown() in packages/bun-error/markdown.ts	128	33	1
function readableAddChunk() in src/js/node/stream.ts	56	31	4
function formatWithOptionsInternal() in src/js/internal/util/inspect.js	123	31	2
void CryptoAlgorithmRSASSA_PKCS1_v1_5::importKey() in src/bun.js/bindings/webcrypto/CryptoAlgorithmRSASSA_PKCS1_v1_5.cpp	69	31	7
void CryptoAlgorithmRSA_PSS::importKey() in src/bun.js/bindings/webcrypto/CryptoAlgorithmRSA_PSS.cpp	69	31	7
void WebSocket::didFailWithErrorCode() in src/bun.js/bindings/webcore/WebSocket.cpp	156	31	1