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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

2% duplication:

80,108 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
2,366 duplicated lines

203 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
source/common (<1%) --> source/extensions (<1%)	154	2 file pairs	details...
include/envoy (<1%) --> source/extensions (<1%)	50	2 file pairs	details...

Open 3D force graph...

Show more details on duplication between components...

Longest Duplicates

The list of 20 longest duplicates.

See data for all 203 duplicates...

Size	#	Folders	Files	Lines	Code
44	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	binary_protocol_impl.h compact_protocol_impl.h	26:69 (67%) 29:72 (54%)	view
24	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	306:331 (1%) 1514:1539 (1%)	view
24	x 2	configs configs	envoy_service_to_service_v2.template.... envoy_service_to_service_v2.template....	122:145 (4%) 176:199 (4%)	view
22	x 2	configs configs	envoy_double_proxy_v2.template.yaml envoy_front_proxy_v2.template.yaml	53:74 (14%) 60:81 (15%)	view
21	x 2	source/common/router source/extensions/filter...ork/thrift_proxy/router	router_ratelimit.cc router_ratelimit_impl.cc	90:110 (20%) 93:113 (19%)	view
19	x 2	source/extensions/filter...ork/dubbo_proxy/filters source/extensions/filter...rk/thrift_proxy/filters	factory_base.h factory_base.h	19:44 (76%) 14:39 (76%)	view
18	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	conn_manager.h thrift_object_impl.h	181:198 (9%) 28:45 (11%)	view
14	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	545:560 (<1%) 735:749 (<1%)	view
14	x 2	source/common/ssl source/common/ssl	context_config_impl.cc context_config_impl.cc	245:260 (5%) 309:324 (5%)	view
13	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	612:624 (<1%) 761:773 (<1%)	view
13	x 2	configs configs	envoy_service_to_service_v2.template.... envoy_service_to_service_v2.template....	58:70 (2%) 254:266 (2%)	view
13	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	599:612 (<1%) 736:749 (<1%)	view
13	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	546:560 (<1%) 599:612 (<1%)	view
13	x 2	source/extensions/access_loggers/file source/extensions/access_loggers/http_grpc	file_access_log_impl.cc grpc_access_log_impl.cc	18:34 (52%) 161:177 (5%)	view
12	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	529:541 (<1%) 737:749 (<1%)	view
12	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	529:541 (<1%) 600:612 (<1%)	view
12	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	529:541 (<1%) 547:560 (<1%)	view
12	x 2	source/common/upstream source/common/upstream	logical_dns_cluster.cc upstream_impl.cc	45:56 (11%) 1201:1212 (1%)	view
11	x 2	configs configs	envoy_service_to_service_v2.template.... envoy_service_to_service_v2.template....	180:190 (2%) 250:260 (2%)	view
11	x 2	configs/freebind configs	freebind.yaml google_com_proxy.v2.yaml	12:22 (32%) 16:26 (25%)	view

Duplicated Units

The list of top 9 duplicated units.

See data for all 9 unit duplicates...

Size	#	Folders	Files	Lines	Code
12	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	1187:1199 1627:1639	view
9	x 2	source/common/json source/common/json	config_schemas.cc config_schemas.cc	931:940 943:952	view
9	x 2	source/common/stats source/common/stats	stat_data_allocator_impl.h stat_data_allocator_impl.h	171:180 183:192	view
9	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	thrift_object_impl.cc thrift_object_impl.cc	166:177 202:213	view
8	x 2	source/extensions/filters/network/ext_authz source/extensions/filters/network/ratelimit	ext_authz.cc ratelimit.cc	49:59 59:69	view
7	x 2	source/extensions/filters/http/grpc_http1_bridge source/extensions/filters/http/grpc_web	http1_bridge_filter.cc grpc_web_filter.cc	97:104 218:225	view
7	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	binary_protocol_impl.cc compact_protocol_impl.cc	216:225 339:348	view
6	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	binary_protocol_impl.cc compact_protocol_impl.cc	184:190 279:285	view
6	x 2	source/extensions/filters/network/thrift_proxy source/extensions/filters/network/thrift_proxy	twitter_protocol_impl.cc twitter_protocol_impl.cc	526:532 914:920	view