JetBrains / Rkernel 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 838 units with 8,951 lines of code in units (61.5% of code).

1 very complex units (309 lines of code)
8 complex units (801 lines of code)
24 medium complex units (1,215 lines of code)
59 simple units (1,544 lines of code)
746 very simple units (5,082 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
void TextBuilder::build() in src/debugger/TextBuilder.cpp	309	115	1
void getValueInfo() in src/RLoader.cpp	142	49	2
SEXP matchArgs() in src/RInternals/MatchArgs.cpp	154	44	3
SEXP RDebugger::doStep() in src/debugger/RDebugger.cpp	80	35	5
Status RPIServiceImpl::loaderGetVariables() in src/RLoader.cpp	80	31	3
static void sigsegvHandler() in src/Session.cpp	98	28	3
SEXP myDoSystem() in src/SubprocessWin.cpp	73	27	4
inline void walkObjectsImpl() in src/RStuff/RUtil.h	81	26	3
Status RPIServiceImpl::executeCode() in src/ExecuteCode.cpp	93	26	3
DoSystemResult myDoSystemImpl() in src/Subprocess.cpp	100	25	9
static SEXP applyFilter() in src/DataFrame.cpp	79	23	2
SEXP myDoSystem() in src/SubprocessUnix.cpp	60	22	4
static void overrideDebuggerPrimitives() in src/debugger/RDebugger.cpp	87	22	0
void preprocessSrcrefs() in src/debugger/SourceFileManager.cpp	44	21	1
SEXP RPIServiceImpl::dereference() in src/RRefs.cpp	55	19	1
static GetContentResult getURLContent() in src/HTMLViewer.cpp	62	18	2
SEXP toSEXP() in src/RStudioApi.cpp	58	18	1
static void executeCodeImpl() in src/ExecuteCode.cpp	65	16	7
Status RPIServiceImpl::dataFrameGetData() in src/DataFrame.cpp	52	15	3
Ptr extrapolate() in src/graphics/PlotUtil.cpp	31	15	2
static void createRefresher() in src/DataFrame.cpp	50	14	2
void RPIServiceImpl::executeOnMainThread() in src/RPIServiceImpl.cpp	50	14	3
static void initDataFrame() in src/DataFrame.cpp	43	13	1
void TextBuilder::buildFunction() in src/debugger/TextBuilder.cpp	44	13	2
SEXP RDebugger::doBegin() in src/debugger/RDebugger.cpp	67	13	4
inline void myWriteConsoleExImpl() in src/IO.cpp	29	12	3
inline std::string getCallFunctionName() in src/RStuff/RUtil.h	24	12	1
inline std::string getSourcePositionText() in src/RStuff/RUtil.h	29	12	2
RObject fromSEXP() in src/RStudioApi.cpp	42	12	1
static std::string getLibraryFunctionName() in src/debugger/SourceFileManager.cpp	39	12	1
void RDebugger::setCommand() in src/debugger/RDebugger.cpp	18	12	1
int myReadConsole() in src/IO.cpp	46	11	4
SEXP SourceFileManager::getFunctionSrcref() in src/debugger/SourceFileManager.cpp	41	11	2
std::string base64_decode() in src/base64/base64.cpp	29	10	1
static void initDoQuit() in src/Init.cpp	35	10	0
Status RPIServiceImpl::dataFrameGetInfo() in src/DataFrame.cpp	38	10	3
inline std::string getFunctionHeaderShort() in src/RStuff/RUtil.h	23	10	1
static std::string joinUrls() in src/HTMLViewer.cpp	13	10	2
static std::pair clipLine() in src/graphics/PlotUtil.cpp	31	10	3
inline std::string escape() in src/util/StringUtil.h	34	10	2
void SourceFileManager::loadState() in src/debugger/SourceFileManager.cpp	21	10	1
std::vector RDebugger::buildStack() in src/debugger/RDebugger.cpp	30	10	1
static void prepareHandler() in src/UnixForkHandler.cpp	29	9	0
static void exceptionToProto() in src/ExecuteCode.cpp	28	9	2
Status RPIServiceImpl::replInterrupt() in src/ExecuteCode.cpp	21	9	3
int calculatePreviewComplexity() in src/graphics/PlotUtil.cpp	21	9	1
void MasterDevice::restart() in src/graphics/MasterDevice.cpp	102	9	0
void fillMessage() in src/RPIServiceImpl.cpp	36	9	2
std::vector RDebugger::getContextDumpErr() in src/debugger/RDebugger.cpp	40	9	0
static void childHandler() in src/UnixForkHandler.cpp	31	8	0