apache / apisix - 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 1,726 units with 24,954 lines of code in units (39.8% of code).

1 very complex units (415 lines of code)
3 complex units (454 lines of code)
59 medium complex units (4,318 lines of code)
148 simple units (5,657 lines of code)
1,515 very simple units (14,110 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
lua function _M.go() in t/lib/ext-plugin.lua	415	64	1
lua function() in apisix/plugins/ext-plugin/init.lua	202	41	4
lua function _M.rewrite() in apisix/plugins/openid-connect.lua	130	33	2
func file_proto_helloworld_proto_init() in t/grpc_server_example/proto/helloworld.pb.go	122	27	0
lua function _M.connect() in apisix/discovery/consul/init.lua	173	25	3
lua function _M.read_yaml_conf() in apisix/cli/file.lua	86	25	1
add_block_preprocessor() in t/APISIX.pm	312	24	0
lua function _M:patch() in apisix/admin/resource.lua	87	24	4
lua function _M.rewrite() in apisix/plugins/proxy-rewrite.lua	102	24	2
lua function _M.set_by_route() in apisix/upstream.lua	109	24	2
lua __index = function() in apisix/core/ctx.lua	76	21	2
lua function _M.init() in apisix/cli/etcd.lua	84	21	2
lua function() in apisix/plugins/ext-plugin/init.lua	97	20	4
lua function _M.http_access_phase() in apisix/init.lua	117	19	0
lua function _M.parse_time_unit() in apisix/core/config_util.lua	61	19	1
lua function _M.access() in apisix/plugins/proxy-cache/memory_handler.lua	76	19	2
lua function _M.handle_upstream() in apisix/init.lua	83	17	3
lua function _M.stream_preread_phase() in apisix/init.lua	92	17	0
lua function _M:put() in apisix/admin/resource.lua	64	17	4
lua function _M.access() in apisix/plugins/traffic-split.lua	62	16	2
lua function _M.rate_limit() in apisix/plugins/limit-count/init.lua	78	16	5
lua function _M.map_message() in apisix/plugins/grpc-transcode/util.lua	64	16	4
lua function _M.from_downstream() in t/xrpc/apisix/stream/xrpc/protocols/pingpong/init.lua	70	15	2
func main() in t/grpc_server_example/main.go	83	15	0
lua function _M.match_and_set() in apisix/ssl/router/radixtree_sni.lua	64	15	3
lua function _M.access() in apisix/plugins/forward-auth.lua	67	15	2
lua function _M.access() in apisix/plugins/ai-prompt-guard.lua	49	15	2
lua function _M.header_filter() in apisix/plugins/brotli.lua	59	15	2
lua function _M.rewrite() in apisix/plugins/redirect.lua	68	15	2
lua function _M.run_plugin() in apisix/plugin.lua	65	15	3
t add_block_preprocessor() in t/plugin/ai-proxy.t	122	14	0
lua function _M.run() in apisix/stream/xrpc/runner.lua	49	14	2
lua function _M.request() in apisix/plugins/ai-drivers/openai-base.lua	74	14	5
lua function _M.increase() in apisix/plugins/limit-conn/init.lua	54	14	2
lua function _M.filter() in apisix/plugin.lua	69	14	5
lua function _M.collect_body() in apisix/utils/log-util.lua	50	13	2
lua function _M.check_ssl_conf() in apisix/ssl.lua	42	13	2
lua function _M.header_filter() in apisix/plugins/gzip.lua	53	13	2
lua function _M.check_schema() in apisix/plugins/response-rewrite.lua	39	13	1
lua function _M.header_filter() in apisix/plugins/cors.lua	58	13	2
lua function _M.mock_zipkin() in t/lib/server.lua	49	12	0
lua function _M:check_conf() in apisix/admin/resource.lua	42	12	5
lua function _M.init_worker() in apisix/discovery/consul/init.lua	50	12	0
lua function _M.wait() in apisix/core/pubsub.lua	56	12	1
lua function _M.get_body() in apisix/core/request.lua	49	12	2
lua function _M.rewrite() in apisix/plugins/zipkin.lua	92	12	2
lua function() in apisix/plugins/ext-plugin/init.lua	70	12	4
lua function _M.rewrite() in apisix/plugins/ai-aws-content-moderation.lua	60	12	2
lua function _M.body_filter() in apisix/plugins/response-rewrite.lua	46	12	2
lua function _M.access() in apisix/plugins/opa.lua	59	12	2