• There are 43 files with units, with 5,139 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 0 complex files (McCabe index sum 126-250; 0 lines of code)
• 2 medium complex files (McCabe index sum 51-125; 746 lines of code)
• 2 slightly complex files (McCabe index sum 26-50; 984 lines of code)
• 39 simple files (McCabe index sum 1-25; 3,409 lines of code)
• 50 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
bucket.py in deep_ep/buffers	272	20	94	35	21
ep.py in deep_ep/buffers	474	16	77	16	17
envs.py in deep_ep/utils	138	17	35	25	6
ep.hpp in csrc/buffers	846	9	29	3	8
refs.py in deep_ep/utils	134	4	25	19	11
math.py in deep_ep/utils	80	11	22	28	5
gate.py in deep_ep/utils	101	7	21	21	8
find_pkgs.py in deep_ep/utils	44	3	21	48	17
all_gather.hpp in csrc/kernels/bucket	180	1	20	11	20
symmetric.hpp in csrc/kernels/comm	261	8	19	7	4
handle.py in deep_ep/comm	46	7	17	37	7
engram.py in deep_ep/buffers	120	8	16	13	5
context.cpp in csrc/kernels/comm	215	9	15	7	3
engram.hpp in csrc/buffers	279	7	15	5	4
bucket.hpp in csrc/buffers	304	4	14	5	7
event.py in deep_ep/utils	33	7	13	39	4
reduce_scatter.hpp in csrc/kernels/bucket	151	1	13	9	13
driver.cpp in csrc/kernels/driver	77	6	12	16	3
dispatch.hpp in csrc/kernels/ep	195	4	10	5	7
base.hpp in csrc/buffers	48	4	8	17	3
pp.py in deep_ep/buffers	33	4	7	21	2
__init__.py in deep_ep	48	2	7	15	6
all_reduce.hpp in csrc/kernels/bucket	117	1	7	6	7
base.py in deep_ep/buffers	17	4	6	35	2
allocator.py in deep_ep/buffers	25	3	6	24	4
pp.hpp in csrc/buffers	117	4	6	5	2
engram.hpp in csrc/kernels/engram	100	2	5	5	4
barrier.hpp in csrc/comm	34	1	5	15	5
stream.hpp in csrc/comm	21	4	4	19	1
system.hpp in csrc/utils	23	1	4	17	4
semantic.py in deep_ep/utils	15	2	3	20	2
pp_send_recv.hpp in csrc/kernels/pp	82	3	3	4	1
combine.hpp in csrc/kernels/ep	170	3	3	2	1
jit.hpp in csrc/runtime	42	2	3	7	2
event.hpp in csrc/utils	27	3	3	11	1
barrier.py in deep_ep/comm	7	1	2	29	2
barrier.hpp in csrc/kernels/comm	40	1	2	5	2
stream.py in deep_ep/comm	6	1	1	17	1
prefetch_weights.hpp in csrc/kernels/ep	51	1	1	2	1
reduce_grads.hpp in csrc/kernels/ep	54	1	1	2	1
api.hpp in csrc/kernels/comm	67	1	1	1	1
handle.hpp in csrc/comm	26	1	1	4	1
tensor.hpp in csrc/utils	19	1	1	5	1

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.