apache / couchdb - Duplication

Intro

For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.

Learn more...

Duplication Overall

15% duplication:

147,825 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
22,228 duplicated lines

96,701 duplicates

dependency graphs: 2D graph | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Duplication Between Components (50+ lines)

Download: SVG DOT (open online Graphviz editor)

From Component --> To Component	Duplicated Lines	File Pairs	Details
ROOT (363%) --> src (1%)	4271	437 file pairs	details...
rel (1283%) --> src (1%)	4261	437 file pairs	details...
dev (968%) --> src (1%)	4261	437 file pairs	details...
src (<1%) --> support (38%)	66	7 file pairs	details...

Open 2D force graph... Open 3D force graph...

Show more details on duplication between components...

Longest Duplicates

The list of 50 longest duplicates.

See data for all 96,701 duplicates...

Size	#	Folders	Files	Lines	Code
194	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/86	util.cpp util.cpp	29:328 (87%) 29:327 (88%)	view
163	x 2	src/chttpd/src src/couch/src	chttpd_rewrite.erl couch_httpd_rewrite.erl	242:414 (32%) 238:410 (31%)	view
160	x 2	src/couch/priv/couch_js/68 src/couch/priv/couch_js/86	util.cpp util.cpp	29:269 (78%) 52:292 (73%)	view
160	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/68	util.cpp util.cpp	52:292 (72%) 29:269 (78%)	view
123	x 2	src/couch_replicator/src src/fabric/src	couch_replicator_fabric.erl fabric_view_all_docs.erl	317:446 (29%) 747:876 (14%)	view
120	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/86	main.cpp main.cpp	44:228 (61%) 58:242 (57%)	view
119	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/68	util.cpp util.cpp	88:259 (57%) 81:252 (58%)	view
119	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/86	util.cpp util.cpp	88:259 (57%) 104:275 (54%)	view
119	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/60	util.cpp util.cpp	104:275 (53%) 88:259 (57%)	view
115	x 2	src/mango/src src/mango/src	mango_idx_nouveau.erl mango_idx_text.erl	191:311 (26%) 196:316 (19%)	view
86	x 2	src/mango/src src/mango/src	mango_idx_nouveau.erl mango_idx_text.erl	370:466 (19%) 383:479 (14%)	view
78	x 2	src/couch/priv/couch_js/68 src/couch/priv/couch_js/86	main.cpp main.cpp	64:184 (38%) 68:188 (37%)	view
78	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/68	main.cpp main.cpp	54:174 (40%) 64:184 (38%)	view
68	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/86	main.cpp main.cpp	231:329 (34%) 245:343 (32%)	view
61	x 2	src/chttpd/src src/couch/src	chttpd_rewrite.erl couch_httpd_rewrite.erl	434:497 (11%) 436:499 (11%)	view
60	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/68	main.cpp main.cpp	136:236 (29%) 136:236 (29%)	view
52	x 2	src/chttpd/src src/couch/src	chttpd_rewrite.erl couch_httpd_rewrite.erl	499:553 (10%) 501:555 (10%)	view
51	x 2	src/mango/src src/mango/src	mango_idx_nouveau.erl mango_idx_text.erl	319:369 (11%) 329:379 (8%)	view
50	x 2	share/server share/server	dispatch-quickjs.js loop.js	48:114 (34%) 57:122 (37%)	view
49	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/86	help.h help.h	18:76 (100%) 18:76 (100%)	view
48	x 2	src/mango/src src/mango/src	mango_idx_nouveau.erl mango_idx_text.erl	136:187 (11%) 143:194 (8%)	view
48	x 2	src/couch_replicator/src src/fabric/src	couch_replicator_fabric.erl fabric_view_map.erl	221:268 (11%) 369:416 (8%)	view
47	x 2	src/mango/src src/mango/src	mango_cursor_text.erl mango_cursor_text.erl	743:789 (4%) 841:887 (4%)	view
46	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/68	help.h help.h	20:75 (95%) 20:75 (95%)	view
46	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/68	help.h help.h	20:75 (95%) 20:75 (95%)	view
46	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/60	help.h help.h	20:75 (95%) 20:75 (95%)	view
43	x 2	src/mango/src src/mango/src	mango_idx_nouveau.erl mango_idx_text.erl	84:128 (9%) 84:128 (7%)	view
38	x 2	src/couch/priv/couch_js/68 src/couch/priv/couch_js/86	help.h help.h	20:62 (79%) 20:62 (77%)	view
38	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/68	help.h help.h	20:62 (77%) 20:62 (79%)	view
38	x 2	src/mango/src src/mango/src	mango_cursor_text.erl mango_cursor_text.erl	650:687 (3%) 952:989 (3%)	view
38	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/102	help.h help.h	20:62 (79%) 20:62 (77%)	view
38	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/60	help.h help.h	20:62 (77%) 20:62 (79%)	view
38	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/86	help.h help.h	20:62 (79%) 20:62 (77%)	view
38	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/86	help.h help.h	20:62 (79%) 20:62 (77%)	view
37	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/68	util.c util.cpp	93:148 (21%) 148:203 (18%)	view
37	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/86	util.c util.cpp	93:148 (21%) 171:226 (16%)	view
37	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/60	util.c util.cpp	93:148 (21%) 155:210 (17%)	view
37	x 2	src/couch/priv/couch_js/1.8.5 src/couch/priv/couch_js/102	util.c util.cpp	93:148 (21%) 171:226 (16%)	view
36	x 2	src/mango/src src/mango/src	mango_cursor_text.erl mango_cursor_text.erl	1000:1035 (3%) 1050:1085 (3%)	view
34	x 2	src/couch/priv/couch_js/68 src/couch/priv/couch_js/86	util.cpp util.cpp	273:332 (16%) 296:355 (15%)	view
34	x 2	src/chttpd/src src/couch/src	chttpd_db.erl couch_httpd_db.erl	1558:1592 (1%) 912:946 (2%)	view
33	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/68	main.cpp main.cpp	177:228 (16%) 185:236 (16%)	view
33	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/60	main.cpp main.cpp	177:228 (16%) 185:236 (16%)	view
33	x 2	src/couch/priv/couch_js/68 src/couch/priv/couch_js/86	main.cpp main.cpp	185:236 (16%) 191:242 (15%)	view
33	x 2	src/couch/priv/couch_js/60 src/couch/priv/couch_js/86	main.cpp main.cpp	185:236 (16%) 191:242 (15%)	view
31	x 2	src/mango/src src/mango/src	mango_cursor_nouveau.erl mango_cursor_text.erl	97:127 (10%) 102:132 (2%)	view
30	x 2	src/fabric/src src/fabric/src	fabric_ring.erl fabric_view.erl	241:271 (5%) 433:463 (3%)	view
29	x 2	src/mango/src src/mango/src	mango_cursor_text.erl mango_cursor_text.erl	649:677 (2%) 846:874 (2%)	view
29	x 2	src/mango/src src/mango/src	mango_cursor_text.erl mango_cursor_text.erl	649:677 (2%) 748:776 (2%)	view
29	x 2	src/chttpd/src src/couch/src	chttpd.erl couch_httpd.erl	133:163 (1%) 88:118 (2%)	view

Duplicated Units

The list of top 4 duplicated units.

See data for all 4 unit duplicates...

Size	#	Folders	Files	Lines	Code
49	x 2	src/couch/priv/couch_js/102 src/couch/priv/couch_js/86	main.cpp main.cpp	245:309 259:323	view
39	x 2	share/server share/server	loop.js dispatch-quickjs.js	69:120 60:112	view
13	x 2	share/server share/server	dreyfus.js nouveau.js	45:59 91:105	view
6	x 2	nouveau/src/main/java/or...che/couchdb/nouveau/api nouveau/src/main/java/or...che/couchdb/nouveau/api	TextField.java StringField.java	30:37 30:37	view