apache / parquet-cppDuplication

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

5% duplication:

22,000 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
1,157 duplicated lines

99 duplicates

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

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 50 longest duplicates.

See data for all 99 duplicates...

Size	#	Folders	Files	Lines	Code
55	x 2	src/parquet/arrow src/parquet	record_reader.cc column_reader.cc	639:732 (12%) 320:413 (20%)	view
25	x 2	src/parquet src/parquet	statistics-test.cc statistics-test.cc	317:344 (4%) 363:390 (4%)	view
18	x 2	src/parquet/arrow src/parquet/arrow	arrow-schema-test.cc arrow-schema-test.cc	266:302 (3%) 775:811 (3%)	view
17	x 2	src/parquet/arrow src/parquet	record_reader.cc column_reader.cc	604:633 (3%) 279:308 (6%)	view
16	x 2	cmake_modules cmake_modules	CompilerInfo.cmake clean-all.cmake	1:16 (27%) 1:16 (59%)	view
16	x 2	cmake_modules cmake_modules	CompilerInfo.cmake FindArrow.cmake	1:16 (27%) 1:16 (14%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake clean-all.cmake	1:16 (23%) 1:16 (59%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake CompilerInfo.cmake	1:16 (23%) 1:16 (27%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake BuildUtils.cmake	1:16 (23%) 1:16 (16%)	view
16	x 2	cmake_modules cmake_modules	BuildUtils.cmake clean-all.cmake	1:16 (16%) 1:16 (59%)	view
16	x 2	cmake_modules cmake_modules	SetupCxxFlags.cmake ThirdpartyToolchain.cmake	1:16 (7%) 1:16 (4%)	view
16	x 2	cmake_modules cmake_modules	BuildUtils.cmake CompilerInfo.cmake	1:16 (16%) 1:16 (27%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake ThirdpartyToolchain.cmake	1:16 (23%) 1:16 (4%)	view
16	x 2	cmake_modules cmake_modules	SetupCxxFlags.cmake clean-all.cmake	1:16 (7%) 1:16 (59%)	view
16	x 2	cmake_modules cmake_modules	ThirdpartyToolchain.cmake clean-all.cmake	1:16 (4%) 1:16 (59%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake SetupCxxFlags.cmake	1:16 (23%) 1:16 (7%)	view
16	x 2	cmake_modules cmake_modules	FindArrow.cmake SetupCxxFlags.cmake	1:16 (14%) 1:16 (7%)	view
16	x 2	cmake_modules cmake_modules	BuildUtils.cmake FindArrow.cmake	1:16 (16%) 1:16 (14%)	view
16	x 2	src/parquet/arrow src/parquet/arrow	arrow-schema-test.cc arrow-schema-test.cc	486:523 (3%) 537:574 (3%)	view
16	x 2	cmake_modules cmake_modules	BuildUtils.cmake ThirdpartyToolchain.cmake	1:16 (16%) 1:16 (4%)	view
16	x 2	cmake_modules cmake_modules	FindArrow.cmake ThirdpartyToolchain.cmake	1:16 (14%) 1:16 (4%)	view
16	x 2	cmake_modules cmake_modules	FindArrow.cmake clean-all.cmake	1:16 (14%) 1:16 (59%)	view
16	x 2	cmake_modules src/parquet	in parquet-cppConfig.cmake.in parquet.pc.in	1:16 (59%) 1:16 (61%)	view
16	x 2	cmake_modules cmake_modules	CompilerInfo.cmake ThirdpartyToolchain.cmake	1:16 (27%) 1:16 (4%)	view
16	x 2	cmake_modules cmake_modules	CompilerInfo.cmake SetupCxxFlags.cmake	1:16 (27%) 1:16 (7%)	view
16	x 2	cmake_modules cmake_modules	ArrowExternalProject.cmake FindArrow.cmake	1:16 (23%) 1:16 (14%)	view
16	x 2	cmake_modules cmake_modules	BuildUtils.cmake SetupCxxFlags.cmake	1:16 (16%) 1:16 (7%)	view
13	x 2	cmake_modules cmake_modules	FindClangTools.cmake FindGBenchmark.cmake	1:13 (11%) 1:13 (15%)	view
13	x 2	cmake_modules cmake_modules	FindClangTools.cmake FindZLIB.cmake	1:13 (11%) 1:13 (13%)	view
13	x 2	cmake_modules cmake_modules	FindGTest.cmake FindZLIB.cmake	1:13 (14%) 1:13 (13%)	view
13	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindClangTools.cmake	1:13 (12%) 1:13 (11%)	view
13	x 2	cmake_modules cmake_modules	FindClangTools.cmake FindSnappy.cmake	1:13 (11%) 1:13 (14%)	view
13	x 2	src/parquet/arrow src/parquet/arrow	arrow-reader-writer-test.cc arrow-reader-writer-test.cc	611:626 (<1%) 1004:1019 (<1%)	view
13	x 2	cmake_modules cmake_modules	FindClangTools.cmake FindGTest.cmake	1:13 (11%) 1:13 (14%)	view
13	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindSnappy.cmake	1:13 (12%) 1:13 (14%)	view
13	x 2	cmake_modules cmake_modules	FindGBenchmark.cmake FindSnappy.cmake	1:13 (15%) 1:13 (14%)	view
13	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindGTest.cmake	1:13 (12%) 1:13 (14%)	view
13	x 2	cmake_modules cmake_modules	FindGBenchmark.cmake FindZLIB.cmake	1:13 (15%) 1:13 (13%)	view
13	x 2	cmake_modules cmake_modules	FindGBenchmark.cmake FindGTest.cmake	1:13 (15%) 1:13 (14%)	view
13	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindGBenchmark.cmake	1:13 (12%) 1:13 (15%)	view
13	x 2	cmake_modules cmake_modules	FindSnappy.cmake FindZLIB.cmake	1:13 (14%) 1:13 (13%)	view
13	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindZLIB.cmake	1:13 (12%) 1:13 (13%)	view
13	x 2	cmake_modules cmake_modules	FindGTest.cmake FindSnappy.cmake	1:13 (14%) 1:13 (14%)	view
12	x 2	cmake_modules cmake_modules	FindThrift.cmake FindZLIB.cmake	2:13 (13%) 1:12 (12%)	view
12	x 2	cmake_modules cmake_modules	FindBrotli.cmake FindThrift.cmake	1:12 (11%) 2:13 (13%)	view
12	x 2	cmake_modules cmake_modules	FindClangTools.cmake FindThrift.cmake	1:12 (10%) 2:13 (13%)	view
12	x 2	cmake_modules cmake_modules	FindGBenchmark.cmake FindThrift.cmake	1:12 (14%) 2:13 (13%)	view
12	x 2	cmake_modules cmake_modules	FindSnappy.cmake FindThrift.cmake	1:12 (13%) 2:13 (13%)	view
12	x 2	cmake_modules cmake_modules	FindGTest.cmake FindThrift.cmake	1:12 (13%) 2:13 (13%)	view
11	x 2	src/parquet/arrow src/parquet/arrow	arrow-reader-writer-test.cc arrow-reader-writer-test.cc	1636:1649 (<1%) 1669:1682 (<1%)	view

Duplicated Units

The list of top 3 duplicated units.

See data for all 3 unit duplicates...

Size	#	Folders	Files	Lines	Code
65	x 2	src/parquet src/parquet/arrow	column_reader.cc record_reader.cc	318:414 637:733	view
20	x 2	src/parquet src/parquet/arrow	column_reader.cc record_reader.cc	278:309 603:634	view
6	x 2	src/parquet/arrow src/parquet	record_reader.cc column_reader.h	429:438 110:119	view