gitlab-org / GitLab-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 10,418 units with 228,721 lines of code in units (71.0% of code).

71 very complex units (17,060 lines of code)
184 complex units (20,719 lines of code)
1,071 medium complex units (56,705 lines of code)
1,792 simple units (51,921 lines of code)
7,300 very simple units (82,316 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	691	167	3
static int handle_revision_opt() in revision.c	381	159	6
sub read_all_remotes() in perl/Git/SVN.pm	778	151	0
void ubc_check() in sha1dc/ubc_check.c	263	129	2
int cmd_rev_parse() in builtin/rev-parse.c	409	127	3
int cmd_clone() in builtin/clone.c	364	116	3
int cmd_merge() in builtin/merge.c	363	115	3
int err_win_to_posix() in compat/mingw.c	113	107	1
static int dowild() in wildmatch.c	182	107	3
int cmd_format_patch() in builtin/log.c	435	105	3
int cmd_mv() in builtin/mv.c	317	92	3
static int patch_update_file() in add-patch.c	290	90	2
static size_t format_commit_one() in pretty.c	284	89	3
static int prepare_to_commit() in builtin/commit.c	282	88	5
int cmd_repack() in builtin/repack.c	319	88	3
int start_command() in run-command.c	275	85	1
int cmd_config() in builtin/config.c	290	85	3
int cmd_pack_objects() in builtin/pack-objects.c	303	85	3
int send_pack() in send-pack.c	231	85	5
static int git_default_core_config() in config.c	242	84	3
int cmd_rev_list() in builtin/rev-list.c	234	84	3
static int pick_commits() in sequencer.c	261	82	3
int cmd_index_pack() in builtin/index-pack.c	208	82	3
static int do_pick_commit() in sequencer.c	229	81	5
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	278	77	3
int is_valid_win32_path() in compat/mingw.c	102	76	2
int cmd_grep() in builtin/grep.c	301	76	3
int cmd_branch() in builtin/branch.c	230	72	3
int cmd_blame() in builtin/blame.c	289	71	3
sub process_file() in git-send-email.perl	224	71	0
static int find_common() in fetch-pack.c	225	70	5
static void builtin_diff() in diff.c	213	70	8
static int process_entry() in merge-ort.c	242	69	4
sub patch_update_file() in git-add--interactive.perl	290	69	0
static int handle_options() in git.c	188	68	3
int cmd_main() in daemon.c	197	67	2
int cmd_tag() in builtin/tag.c	200	67	3
def run() in git-p4.py	162	67	2
int setup_revisions() in revision.c	145	66	4
static int apply_one_fragment() in apply.c	187	65	6
int cmd__path_utils() in t/helper/test-path-utils.c	173	65	2
static int write_midx_internal() in midx.c	259	65	6
static enum parse_opt_result usage_with_options_internal() in parse-options.c	132	65	5
static int do_write_index() in read-cache.c	202	64	4
int cmd_main() in http-push.c	236	63	2
void diffcore_rename_extended() in diffcore-rename.c	231	62	6
int cmd_fetch() in builtin/fetch.c	179	62	3
int threeway_merge() in unpack-trees.c	123	62	2