mozilla / mozjpeg - 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 416 units with 16,112 lines of code in units (15.1% of code).

11 very complex units (2,439 lines of code)
17 complex units (2,230 lines of code)
41 medium complex units (2,962 lines of code)
64 simple units (3,180 lines of code)
283 very simple units (5,301 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
int main() in tjbench.c	299	159	2
public static void main() in java/TJBench.java	351	154	1
static int decompTest() in tjbench.c	246	122	1
DLLEXPORT int tj3Transform() in turbojpeg.c	176	88	7
int main() in tjexample.c	213	86	2
static void decompTest() in java/TJBench.java	211	85	1
static int fullTest() in tjbench.c	226	83	7
public static void main() in java/TJExample.java	216	71	1
static int decomp() in tjbench.c	179	70	10
static void decomp() in java/TJBench.java	148	55	10
static void fullTest() in java/TJBench.java	174	55	7
static int doBmpTest() in tjunittest.c	147	50	6
DLLEXPORT int tj3Set() in turbojpeg.c	127	47	3
public static void main() in java/TJUnitTest.java	96	44	1
DLLEXPORT int tj3CompressFromYUVPlanes8() in turbojpeg.c	113	41	7
DLLEXPORT int tj3DecompressToYUVPlanes8() in turbojpeg.c	130	41	5
DLLEXPORT int tj3EncodeYUVPlanes8() in turbojpeg.c	129	40	8
DLLEXPORT int tj3DecodeYUVPlanes8() in turbojpeg.c	119	36	8
static int getSubsamp() in turbojpeg.c	65	35	1
DLLEXPORT int GET_NAME() in turbojpeg-mp.c	122	35	2
void jsimd_h2v1_merged_upsample_neon() in simd/arm/jdmrgext-neon.c	228	33	4
void jsimd_h2v2_merged_upsample_neon() in simd/arm/jdmrgext-neon.c	329	33	4
static void bufSizeTest() in tjunittest.c	96	32	1
DLLEXPORT int tj3Get() in turbojpeg.c	58	27	2
int main() in tjunittest.c	71	27	2
void jsimd_ycc_rgb_convert_neon() in simd/arm/jdcolext-neon.c	270	26	5
private void setBuf() in java/org/libjpegturbo/turbojpeg/YUVImage.java	43	26	7
source: function() in java/doc/search.js	87	26	2
DLLEXPORT int GET_NAME() in turbojpeg-mp.c	54	25	2
static int checkBufYUV() in java/TJUnitTest.java	87	24	6
public void setSourceImage() in java/org/libjpegturbo/turbojpeg/TJCompressor.java	66	24	5
static int cmpBitmap() in tjunittest.c	47	23	7
static int checkBuf() in java/TJUnitTest.java	113	23	8
public void decompress8() in java/org/libjpegturbo/turbojpeg/TJDecompressor.java	74	23	1
static void initBuf() in tjunittest.c	53	22	5
static int checkBuf() in tjunittest.c	89	22	7
static void initBuf() in java/TJUnitTest.java	66	22	6
static void decompTest() in java/TJUnitTest.java	74	22	9
static void doTest() in java/TJUnitTest.java	47	22	5
static void overflowTest() in java/TJUnitTest.java	46	22	0
this.Nav = function() in doc/html/search/search.js	77	22	2
DLLEXPORT int tj3SetCroppingRegion() in turbojpeg.c	41	21	2
DLLEXPORT int GET_NAME() in turbojpeg-mp.c	80	21	2
static void _decompTest() in tjunittest.c	75	21	9
void jsimd_rgb_gray_convert_altivec() in simd/powerpc/jcgryext-altivec.c	140	20	5
static int checkBufYUV() in tjunittest.c	64	18	5
static void decompTest() in tjunittest.c	25	18	8
static void doTest() in tjunittest.c	51	18	6
DLLEXPORT int tjDecompress2() in turbojpeg.c	39	17	9
void jsimd_rgb_ycc_convert_altivec() in simd/powerpc/jccolext-altivec.c	174	17	5