• File size measurements show the distribution of size of files.
• Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
• It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

• There are 524 files with 90,906 lines of code.
• 14 very long files (20,679 lines of code)
• 35 long files (24,552 lines of code)
• 70 medium size files (21,936 lines of codeclsfd_ftr_w_mp_ins)
• 84 small files (12,046 lines of code)
• 321 very small files (11,693 lines of code)

There are 91 files with lines longer than 120 characters. In total, there are 475 long lines.

File	# lines	# units	# long lines
t rcvd_parser.t in t	323	-	185
com winxpnews.com in t/data/welcomelists	520	-	51
t parameter_header.t in t	259	-	16
t mkrules.t in t	375	3	15
t trust_path.t in t	437	1	11
sa-stats.pl in tools	625	5	10
t uri.t in t	306	5	8
Received.pm in lib/Mail/SpamAssassin/Message/Metadata	727	4	6
BodyRuleBaseExtractor.pm in lib/Mail/SpamAssassin/Plugin	690	14	6
PerMsgStatus.pm in lib/Mail/SpamAssassin	2198	112	6
t hashbl.t in t	118	1	5
TxRep.pm in lib/Mail/SpamAssassin/Plugin	791	20	5
DMARC.pm in lib/Mail/SpamAssassin/Plugin	304	15	5
ExtractText.pm in lib/Mail/SpamAssassin/Plugin	393	9	5
t mkrules_else.t in t	139	3	4
t re_base_extraction.t in t	356	1	4
t get_all_headers.t in t	40	-	4
f2c.c in build/pga/source	1559	163	4
DecodeShortURLs.pm in lib/Mail/SpamAssassin/Plugin	547	30	4
t extracttext.t in t	63	-	3
t header_utf8.t in t	185	-	3
SATest.pm in t	941	48	3
sare-sa-stats.pl in tools	228	4	3
cgi ruleqa.cgi in masses/rule-qa/automc	1760	-	3
Redirectors.pm in lib/Mail/SpamAssassin/Plugin	608	26	3
ImageInfo.pm in lib/Mail/SpamAssassin/Plugin	222	13	3
AutoLearnThreshold.pm in lib/Mail/SpamAssassin/Plugin	119	3	3
BayesStore.pm in lib/Mail/SpamAssassin	293	39	3
t redirectors.t in t	56	-	2
eml nodmarc.eml in t/data/spam/dmarc	20	-	2
eml utf8_anchor_text.eml in t/data/spam	210	-	2
eml ok01.eml in t/data/dkim/arc	19	-	2
t html_visibility.t in t	207	-	2
t mimeparse.t in t	129	-	2
t sa_txrep.t in t	108	-	2
t desc_wrap.t in t	28	-	2
t util_wrap.t in t	67	-	2
t sa_compile.t in t	133	3	2
libspamc.c in spamc	1842	29	2
libspamc.h in spamc	164	-	2
perceptron.c in masses	322	12	2
post-ga-analysis.pl in masses	92	-	2
evolve_metarule.c in masses/evolve_metarule	240	5	2
SpamAssassin.pm in lib/Mail	1175	61	2
SQLBasedAddrList.pm in lib/Mail/SpamAssassin	297	7	2
AuthRes.pm in lib/Mail/SpamAssassin/Plugin	371	5	2
AWL.pm in lib/Mail/SpamAssassin/Plugin	314	6	2
Bayes.pm in lib/Mail/SpamAssassin/Plugin	1234	39	2
OLEVBMacro.pm in lib/Mail/SpamAssassin/Plugin	676	30	2
MIMEEval.pm in lib/Mail/SpamAssassin/Plugin	335	18	2