alibaba / xquic - 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 56 units with 1,359 lines of code in units (2.2% of code).

1 very complex units (177 lines of code)
0 complex units (0 lines of code)
10 medium complex units (404 lines of code)
22 simple units (515 lines of code)
23 very simple units (263 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
def parse_frames_processed() in scripts/qlog_parser.py	177	94	1
xqc_int_t xqc_datagram_send() in src/transport/xqc_datagram.c	89	24	5
def parse_line() in scripts/qlog_parser.py	47	17	1
def parse_http_frame_created() in scripts/qlog_parser.py	49	16	1
def parse_rec_metrics_updated() in scripts/qlog_parser.py	28	13	1
unsigned char() in src/transport/fec_schemes/xqc_galois_calculation.c	42	13	1
def parse_alpn_information() in scripts/qlog_parser.py	30	11	1
def parse_packets_acked() in scripts/qlog_parser.py	29	11	1
def parse_stream_state_updated() in scripts/qlog_parser.py	29	11	1
def main() in scripts/qlog_parser.py	34	11	0
int xqc_send_queue_out_queue_empty() in src/transport/xqc_send_queue.c	27	11	1
def endpoint_events_extraction() in scripts/qlog_parser.py	47	10	2
def parse_connection_started() in scripts/qlog_parser.py	27	10	1
def parse_stream_data_moved() in scripts/qlog_parser.py	28	10	1
def parse_packet_sent_and_recv() in scripts/qlog_parser.py	28	9	1
def parse_mtu_updated() in scripts/qlog_parser.py	23	9	1
def parse_packet_buffered() in scripts/qlog_parser.py	28	9	1
def parse_packet_lost() in scripts/qlog_parser.py	23	8	1
def parse_http_stream_type_set() in scripts/qlog_parser.py	20	8	1
def parse_http_frame_parsed() in scripts/qlog_parser.py	18	8	1
def parse_server_listening() in scripts/qlog_parser.py	20	7	1
def parse_connection_closed() in scripts/qlog_parser.py	19	7	1
def parse_connection_state_updated() in scripts/qlog_parser.py	19	7	1
def parse_path_assigned() in scripts/qlog_parser.py	19	7	1
def parse_parameters_set() in scripts/qlog_parser.py	20	7	1
def parse_datagrams_sent_or_recv() in scripts/qlog_parser.py	20	7	1
def parse_congestion_state_updated() in scripts/qlog_parser.py	16	7	1
def parse_http_parameters_set() in scripts/qlog_parser.py	18	7	1
xqc_gp_timer_id_t xqc_timer_register_gp_timer() in src/transport/xqc_timer.c	30	7	4
unsigned char() in src/transport/fec_schemes/xqc_galois_calculation.c	24	7	1
def get_path_id() in scripts/qlog_parser.py	12	6	1
def parse_rec_parameters_set() in scripts/qlog_parser.py	16	6	1
int main() in mini/mini_client.c	40	6	2
void xqc_packet_update_reserved_bits() in src/transport/xqc_packet_parser.c	15	5	1
xqc_int_t xqc_parse_datagram_frame() in src/transport/xqc_frame_parser.c	32	5	4
unsigned char() in src/transport/fec_schemes/xqc_galois_calculation.c	16	5	1
static size_t xqc_write_packet_receive_timestamps_into_buf() in src/transport/xqc_frame_parser.c	26	4	5
int xqc_engine_conn_pq_operator() in src/transport/xqc_engine.c	9	3	2
unsigned char() in src/transport/fec_schemes/xqc_galois_calculation.c	8	3	1
void xqc_conn_check_app_limit() in src/transport/xqc_conn.c	16	3	1
static xqc_int_t xqc_decode_max_receive_timestamps_per_ack() in src/transport/xqc_transport_params.c	9	2	6
static xqc_int_t xqc_decode_receive_timestamps_exponent() in src/transport/xqc_transport_params.c	9	2	6
void xqc_engine_main_logic_internal() in src/transport/xqc_engine.c	8	2	1
offset ? xqc_vint_len_by_val() in src/transport/xqc_frame.c	6	2	1
long xqc_random() in src/common/xqc_random.c	11	2	1
static xqc_int_t xqc_decode_extended_ack_features() in src/transport/xqc_transport_params.c	5	1	6
typedef xqc_int_t() in src/transport/xqc_transport_params.c	36	1	1
void xqc_engine_finish_recv() in src/transport/xqc_engine.c	3	1	1
void xqc_engine_finish_send() in src/transport/xqc_engine.c	3	1	1
void xqc_send_queue_drop_initial_packets() in src/transport/xqc_send_queue.c	8	1	1