apache / serf - 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 493 units with 10,240 lines of code in units (45.2% of code).

0 very complex units (0 lines of code)
6 complex units (800 lines of code)
48 medium complex units (2,864 lines of code)
72 simple units (2,234 lines of code)
367 very simple units (4,342 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
static apr_status_t run_machine() in buckets/response_buckets.c	164	46	2
static apr_status_t read_from_connection() in src/outgoing.c	133	42	1
static apr_status_t fcgi_process() in protocols/fcgi_protocol.c	170	31	1
apr_status_t serf_bucket_limited_readline() in buckets/buckets.c	69	29	6
static apr_status_t serf_deflate_refill() in buckets/deflate_buckets.c	134	26	1
static apr_status_t serf_deflate_wait_for_data() in buckets/deflate_buckets.c	130	26	1
static apr_status_t process_connection() in src/outgoing.c	73	25	2
static apr_status_t fcgi_params_decode() in buckets/fcgi_buckets.c	101	24	1
static apr_status_t serf_incoming_rq_wait_for() in buckets/request_buckets.c	63	22	2
static int ssl_need_client_cert() in buckets/ssl_buckets.c	115	21	3
static apr_status_t read_aggregate() in buckets/aggregate_buckets.c	70	20	5
apr_status_t serf__bucket_fcgi_unframe_read_info() in buckets/fcgi_buckets.c	68	20	3
void serf_util_readline() in buckets/buckets.c	65	20	4
apr_status_t serf_pump__write() in src/pump.c	49	19	2
apr_status_t serf__conn_update_pollset() in src/outgoing.c	51	19	1
static apr_status_t ssl_encrypt() in buckets/ssl_buckets.c	113	19	4
static apr_status_t write_to_connection() in src/outgoing.c	54	18	1
void serf_connection_request_prioritize() in src/outgoing_request.c	59	18	4
static apr_status_t read_prefix() in buckets/prefix_buckets.c	54	18	1
apr_status_t serf_linebuf_fetch() in buckets/buckets.c	62	17	3
static apr_status_t wait_for_chunk() in buckets/dechunk_buckets.c	59	17	1
static apr_status_t read_from_client() in src/incoming.c	74	16	1
apr_status_t serf__process_client() in src/incoming.c	55	16	2
apr_status_t serf__destroy_request() in src/outgoing_request.c	68	16	1
static apr_status_t refill_output() in buckets/brotli_buckets.c	51	16	2
apr_status_t serf_ssl_ocsp_response_verify() in buckets/ssl_buckets.c	76	16	8
apr_status_t serf__handle_auth_response() in auth/auth.c	64	16	4
static apr_status_t run_machine() in buckets/bwtp_buckets.c	49	15	2
static apr_status_t serf_copy_read() in buckets/copy_buckets.c	50	15	4
static apr_status_t serf_fcgi_frame_refill() in buckets/fcgi_buckets.c	87	15	1
static apr_status_t serf_split_read_iovec() in buckets/split_buckets.c	54	15	5
static apr_status_t ssl_decrypt() in buckets/ssl_buckets.c	74	15	4
apr_status_t serf__open_connections() in src/outgoing.c	60	14	1
static apr_status_t handle_response() in src/ssltunnel.c	52	14	4
static apr_status_t hpack_read_bytes() in buckets/hpack_buckets.c	54	14	3
static apr_status_t serf_deflate_read() in buckets/deflate_buckets.c	41	14	4
static apr_status_t serf_split_read() in buckets/split_buckets.c	50	14	4
apr_status_t serf_connection__request_requeue() in src/outgoing_request.c	81	13	1
static apr_status_t serf_deflate_peek() in buckets/deflate_buckets.c	41	13	3
static apr_status_t serf_copy_read_iovec() in buckets/copy_buckets.c	55	13	5
static apr_status_t serf_aggregate_peek() in buckets/aggregate_buckets.c	51	13	3
static apr_status_t serf_fcgi_unframe_read() in buckets/fcgi_buckets.c	41	13	4
static apr_status_t reset_connection() in src/outgoing.c	73	12	2
apr_status_t serf_connection_close() in src/outgoing.c	47	12	1
void serf_debug__bucket_destroy() in buckets/allocator.c	37	12	1
static apr_status_t serf_event_read_iovec() in buckets/event_buckets.c	41	12	5
static apr_uint64_t serf_split_get_remaining() in buckets/split_buckets.c	42	12	1
static apr_status_t perform_peek_protocol() in src/incoming.c	65	11	1
static apr_status_t clean_resp() in src/outgoing_request.c	31	11	1
static apr_status_t serf_event_read() in buckets/event_buckets.c	38	11	4