apache / incubator-pegasus - 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 8,003 units with 115,655 lines of code in units (67.9% of code).

10 very complex units (2,686 lines of code)
50 complex units (6,738 lines of code)
305 medium complex units (19,180 lines of code)
721 simple units (24,577 lines of code)
6,917 very simple units (62,474 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
func main() in go-client/idl/rrdb/rrdb-remote/rrdb-remote.go	469	80	0
bool count_data() in src/shell/commands/data_operations.cpp	363	77	3
bool copy_data() in src/shell/commands/data_operations.cpp	356	75	3
bool replica::update_local_configuration() in src/replica/replica_config.cpp	305	75	2
void pegasus_server_impl::on_multi_get() in src/server/pegasus_server_impl.cpp	341	71	1
func() in go-client/idl/replication/dsn.layer2.go	167	64	1
bool full_scan() in src/shell/commands/data_operations.cpp	233	56	3
bool query_bulk_load_status() in src/shell/commands/bulk_load.cpp	178	52	3
func() in go-client/idl/replication/dsn.layer2.go	137	52	1
func() in go-client/idl/admin/bulk_load.go	137	52	1
bool ls_nodes() in src/shell/commands/node_management.cpp	277	50	3
static int linenoiseEdit() in src/shell/linenoise/linenoise.c	155	49	5
func() in go-client/idl/admin/bulk_load.go	127	48	1
bool hash_scan() in src/shell/commands/data_operations.cpp	196	45	3
void pegasus_server_impl::on_get_scanner() in src/server/pegasus_server_impl.cpp	201	45	1
bool clear_data() in src/shell/commands/data_operations.cpp	237	44	3
func() in go-client/idl/admin/metadata.go	117	44	1
func() in go-client/idl/admin/backup.go	117	44	1
func() in go-client/idl/admin/bulk_load.go	117	44	1
pc_status partition_guardian::on_missing_primary() in src/meta/partition_guardian.cpp	239	43	2
inline void scan_data_next() in src/shell/command_helper.h	192	41	1
bool ddd_diagnose() in src/shell/commands/recovery.cpp	175	41	3
func() in go-client/idl/admin/metadata.go	107	40	1
func() in go-client/idl/admin/bulk_load.go	107	40	1
func() in go-client/idl/admin/duplication.go	107	40	1
bool app_disk() in src/shell/commands/table_management.cpp	220	39	3
bool multi_del_range() in src/shell/commands/data_operations.cpp	185	39	3
bool validate_check() in src/server/pegasus_write_service_impl.h	100	36	6
func() in go-client/idl/admin/backup.go	97	36	1
func() in go-client/idl/admin/backup.go	97	36	1
func() in go-client/idl/admin/backup.go	97	36	1
bool configuration::load() in src/utils/configuration.cpp	134	35	2
void replica::on_learn_reply() in src/replica/replica_learn.cpp	309	35	3
error_code mutation_log::open() in src/replica/mutation_log.cpp	146	32	3
func() in go-client/idl/admin/backup.go	87	32	1
func() in go-client/idl/admin/backup.go	87	32	1
func() in go-client/idl/admin/duplication.go	87	32	1
func() in go-client/idl/radmin/replica_admin.go	87	32	1
dsn::error_code pegasus_server_impl::start() in src/server/pegasus_server_impl.cpp	236	30	2
bool server_state::check_all_partitions() in src/meta/server_state.cpp	154	30	0
void backup_service::modify_backup_policy() in src/meta/meta_backup_service.cpp	144	29	1
bool run() in src/runtime/service_api_c.cpp	166	28	4
static int extract_symbols_from_binary() in src/http/pprof_http_service.cpp	86	28	2
void server_state::update_configuration_locally() in src/meta/server_state.cpp	134	28	2
func() in go-client/idl/replication/dsn.layer2.go	77	28	1
func() in go-client/idl/replication/dsn.layer2.go	77	28	1
func() in go-client/idl/admin/backup.go	77	28	1
func() in go-client/idl/admin/partition_split.go	77	28	1
func() in go-client/idl/admin/partition_split.go	77	28	1
func() in go-client/idl/admin/partition_split.go	77	28	1