gitlab-org / Git - 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 10,930 units with 244,194 lines of code in units (71.1% of code).

76 very complex units (18,618 lines of code)
200 complex units (23,308 lines of code)
1,129 medium complex units (60,719 lines of code)
1,875 simple units (53,916 lines of code)
7,650 very simple units (87,633 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 cmd_rebase() in builtin/rebase.c	685	173	4
static int handle_revision_opt() in revision.c	384	159	6
sub read_all_remotes() in perl/Git/SVN.pm	778	151	0
int cmd_rev_parse() in builtin/rev-parse.c	462	139	4
int cmd_clone() in builtin/clone.c	552	134	4
void ubc_check() in sha1dc/ubc_check.c	263	129	2
int cmd_format_patch() in builtin/log.c	476	119	4
int cmd_merge() in builtin/merge.c	377	108	4
static int dowild() in wildmatch.c	189	108	3
int err_win_to_posix() in compat/mingw.c	113	107	1
static int patch_update_file() in add-patch.c	316	99	2
static size_t format_commit_one() in pretty.c	309	95	3
int cmd_mv() in builtin/mv.c	352	95	4
int cmd_rev_list() in builtin/rev-list.c	254	94	4
int cmd_repack() in builtin/repack.c	330	88	4
static int write_midx_internal() in midx-write.c	344	86	7
static int prepare_to_commit() in builtin/commit.c	277	86	5
int cmd_pack_objects() in builtin/pack-objects.c	334	86	4
int start_command() in run-command.c	273	85	1
static int do_pick_commit() in sequencer.c	239	83	5
int send_pack() in send-pack.c	242	83	6
int cmd_index_pack() in builtin/index-pack.c	210	81	4
static void sha1_recompression_step() in sha1dc/sha1.c	408	81	5
def run() in git-p4.py	199	81	2
int cmd_show_branch() in builtin/show-branch.c	311	78	4
int is_valid_win32_path() in compat/mingw.c	102	76	2
int cmd_grep() in builtin/grep.c	315	76	4
int cmd_branch() in builtin/branch.c	264	75	4
static int git_default_core_config() in config.c	218	74	4
int cmd__path_utils() in t/helper/test-path-utils.c	199	73	2
int cmd_tag() in builtin/tag.c	241	73	4
int cmd_blame() in builtin/blame.c	295	72	4
static int handle_options() in git.c	197	72	3
static int find_common() in fetch-pack.c	225	70	5
int cmd_main() in daemon.c	205	70	2
int cmd_fetch() in builtin/fetch.c	328	70	4
static void builtin_diff() in diff.c	219	70	8
static int process_entry() in merge-ort.c	242	69	4
def run() in git-p4.py	163	68	2
static enum parse_opt_result usage_with_options_internal() in parse-options.c	137	66	5
static int apply_one_fragment() in apply.c	181	65	6
void diffcore_rename_extended() in diffcore-rename.c	232	65	6
static int do_write_index() in read-cache.c	228	64	4
int cmd_main() in http-push.c	240	63	2
int cmd_add() in builtin/add.c	168	63	4
static enum parse_opt_result do_get_value() in parse-options.c	174	63	4
int setup_revisions() in revision.c	147	62	4
static int stack_compact_range() in reftable/stack.c	218	62	5
int threeway_merge() in unpack-trees.c	123	62	2
static int pick_commits() in sequencer.c	202	61	3