facebookincubator / automerge

Conditional Complexity

The distribution of complexity of units (measured with McCabe index).

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).

Learn more...

Conditional Complexity Overall

There are 322 units with 4,792 lines of code in units (89.8% of code).

3 very complex units (400 lines of code)
4 complex units (217 lines of code)
39 medium complex units (1,423 lines of code)
52 simple units (1,068 lines of code)
224 very simple units (1,684 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
function mergeDocChangeOps() in backend/new.js	163	116	7
function seekWithinBlock() in backend/new.js	136	77	4
function updatePatchProperty() in backend/new.js	101	59	8
_objectUpdate() in frontend/observable.js	64	46	5
copyFrom() in backend/encoding.js	62	46	2
function updateBlockColumns() in backend/new.js	35	35	2
function seekToOp() in backend/new.js	56	26	2
function setupPatches() in backend/new.js	57	25	3
function appendEdit() in backend/new.js	32	24	2
function groupChangeOps() in backend/columnar.js	64	22	2
splice() in frontend/context.js	37	21	4
insertListItems() in frontend/context.js	34	20	4
_appendValue() in backend/encoding.js	76	20	2
function copyColumns() in backend/new.js	48	20	3
function generateSyncMessage() in backend/sync.js	38	18	2
function appendOperation() in backend/new.js	33	18	3
function getChangesToSend() in backend/sync.js	47	17	3
copyFrom() in backend/encoding.js	28	17	2
function encodeValue() in backend/columnar.js	34	17	2
function updateBlockMetadata() in backend/new.js	44	17	2
function readOperation() in backend/new.js	40	17	2
function parseAllOpIds() in backend/columnar.js	37	16	2
function addBlockOperation() in backend/new.js	23	16	5
function readNextChangeOp() in backend/new.js	35	16	2
appendInt64() in backend/encoding.js	25	15	2
function readDocumentChanges() in backend/new.js	29	15	1
getValueDescription() in frontend/context.js	36	14	1
readInt64() in backend/encoding.js	36	14	0
copyFrom() in backend/encoding.js	27	14	2
function applyChanges() in backend/new.js	36	14	4
function updateListObject() in frontend/apply_patch.js	49	13	3
readInt32() in backend/encoding.js	22	13	0
function decodeOps() in backend/columnar.js	28	13	2
function decodeDocumentChanges() in backend/columnar.js	34	13	2
applyChanges() in backend/new.js	60	13	2
function decodeValue() in backend/columnar.js	30	12	2
function expandMultiOps() in backend/columnar.js	30	12	3
function documentPatch() in backend/new.js	29	12	1
getChanges() in backend/new.js	37	12	1
function interpretPatch() in frontend/apply_patch.js	17	11	3
function makeChange() in frontend/index.js	38	11	3
createNestedObjects() in frontend/context.js	36	11	6
setValue() in frontend/context.js	18	11	6
appendUint64() in backend/encoding.js	23	11	2
function encodeOps() in backend/columnar.js	62	11	2
function applyOps() in backend/new.js	14	11	3
function init() in frontend/index.js	34	10	1
function change() in frontend/index.js	29	10	3
getSubpatch() in frontend/context.js	28	10	2
readRecord() in backend/encoding.js	23	10	0