• There are 88 files with units, with 8,426 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 1 complex files (McCabe index sum 126-250; 595 lines of code)
• 9 medium complex files (McCabe index sum 51-125; 2,217 lines of code)
• 9 slightly complex files (McCabe index sum 26-50; 1,801 lines of code)
• 69 simple files (McCabe index sum 1-25; 3,813 lines of code)
• 48 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
VidispineMessageProcessor.scala in online_nearline/src/main/scala	595	20	128	22	17
MediaNotRequiredMessageProcessor.scala in media_remover/src/main/scala	418	32	121	29	19
PlutoCoreMessageProcessor.scala in project_restorer/src/main/scala	248	19	82	33	11
VidispineMessageProcessor.scala in online_archive/src/main/scala	303	12	68	22	13
VidispineCommunicator.scala in common/src/main/scala/com/gu/multimedia/storagetier/vidispine	245	23	59	24	11
OnlineArchiveMessageProcessor.scala in media_remover/src/main/scala	183	11	54	30	18
FileUploader.scala in online_archive/src/main/scala	228	15	53	23	8
NearlineHelper.scala in media_remover/src/main/scala/helpers	200	16	53	27	6
OwnMessageProcessor.scala in online_archive/src/main/scala	209	8	52	25	11
OnlineNearlineMessageProcessor.scala in media_remover/src/main/scala	183	6	51	28	15
VidispineFunctions.scala in online_archive/src/main/scala	279	9	50	18	11
MessageProcessingFramework.scala in common/src/main/scala/com/gu/multimedia/storagetier/framework	342	17	49	14	18
OwnMessageProcessor.scala in online_nearline/src/main/scala	226	9	47	21	10
FileCopier.scala in online_nearline/src/main/scala	129	13	33	26	9
Copier.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/helpers	197	8	32	16	15
AssetFolderLookup.scala in common/src/main/scala/com/gu/multimedia/storagetier/plutocore	147	11	32	22	9
AssetSweeperMessageProcessor.scala in online_archive/src/main/scala	187	6	32	17	9
MatrixStoreHelper.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/helpers	170	8	28	16	10
AssetSweeperMessageProcessor.scala in online_nearline/src/main/scala	124	4	26	21	9
S3ObjectChecker.scala in media_remover/src/main/scala	86	6	22	26	9
PendingDeletionHelper.scala in media_remover/src/main/scala/helpers	92	4	22	24	10
ArchiveHunterCommunicator.scala in online_archive/src/main/scala/archivehunter	113	4	21	19	9
MetadataHelper.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/helpers	81	6	20	25	9
OnlineHelper.scala in media_remover/src/main/scala/helpers	71	5	18	25	5
MXSConnectionBuilderImpl.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy	99	7	17	17	7
requeue-missing-nearlineid.py in scripts/vidispine-no-nearlineid	130	6	17	13	6
MatrixStoreFileSource.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/streamcomponents	88	5	15	17	4
RoutingKeyMatcher.scala in common/src/main/scala/com/gu/multimedia/storagetier/framework	39	3	15	38	11
TrustStoreHelper.scala in common/src/main/scala/com/gu/multimedia/storagetier/utils	87	4	15	17	6
AkkaHttpHelpers.scala in common/src/main/scala/com/gu/multimedia/storagetier/utils	69	4	15	22	10
ObjectMatrixEntry.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/models	51	4	12	24	6
ArchivedRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/online_archive	68	6	12	18	4
IgnoredRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/online_archive	71	4	12	17	6
PendingDeletionRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/media_remover	106	4	12	11	4
MxsMetadata.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/models	56	3	11	20	9
OMSearchSource.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/streamcomponents	64	1	11	17	11
OMDelete.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/streamcomponents	73	4	11	15	8
NearlineRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/nearline_archive	71	6	11	15	4
replay.py in scripts/replay-from-filestobackup	94	4	11	12	5
ChecksumChecker.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy	59	5	10	17	6
MMappedFileSource.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/streamcomponents	73	1	10	14	10
VidispineMediaIngested.scala in common/src/main/scala/com/gu/multimedia/storagetier/messages	45	5	9	20	4
SearchResultDocument.scala in common/src/main/scala/com/gu/multimedia/storagetier/vidispine	83	3	9	11	4
Main.scala in online_archive/src/main/scala	143	1	9	6	9
Ensurer.scala in media_remover/src/main/scala/utils	16	2	9	56	6
OMLookupMetadata.scala in mxs-copy-components/src/main/scala/com/gu/multimedia/mxscopy/streamcomponents	60	1	8	13	8
FailureRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/nearline_archive	50	3	8	16	4
FailureRecordDAO.scala in common/src/main/scala/com/gu/multimedia/storagetier/models/online_archive	50	3	8	16	4
MetadataValues.scala in common/src/main/scala/com/gu/multimedia/storagetier/vidispine	52	2	8	15	4
PlutoCoreEnvironmentConfigProvider.scala in common/src/main/scala/com/gu/multimedia/storagetier/plutocore	21	2	8	38	5

• 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.