Ownership is measured by how many commits each author made to each file in the current tree. It highlights bus-factor risk (files only one person has ever touched) and where knowledge is concentrated. The bus factor is the smallest number of people who are, between them, primary owner of more than half of the files.
Files only one author has ever changed. The more a file has changed, the more knowledge is at risk if that person leaves.
| File | Sole owner | Commits |
|---|---|---|
| ruby/red-arrow-format/test/test-writer.rb | Sutou Kouhei | 28 |
| c_glib/arrow-glib/array.h | Sutou Kouhei | 22 |
| cpp/meson.options | William Ayd | 20 |
| ruby/red-arrow-format/test/test-reader.rb | Sutou Kouhei | 15 |
| matlab/test/arrow/array/hNumericArray.m | Sarah Gilmore | 14 |
| ruby/red-arrow-format/lib/arrow-format/field.rb | Sutou Kouhei | 11 |
| ruby/red-arrow-format/lib/arrow-format/readable.rb | Sutou Kouhei | 11 |
| dev/tasks/linux-packages/apache-arrow-release/yum/Apache-Arrow.repo | Sutou Kouhei | 11 |
| cpp/src/arrow/flight/test_definitions.h | David Li | 10 |
| ruby/red-arrow-format/lib/arrow-format/bitmap.rb | Sutou Kouhei | 9 |
| File | Sole owner | Commits |
|---|---|---|
| ruby/red-arrow-format/test/test-writer.rb | Sutou Kouhei | 28 |
| c_glib/arrow-glib/array.h | Sutou Kouhei | 22 |
| cpp/meson.options | William Ayd | 20 |
| ruby/red-arrow-format/test/test-reader.rb | Sutou Kouhei | 15 |
| matlab/test/arrow/array/hNumericArray.m | Sarah Gilmore | 14 |
| ruby/red-arrow-format/lib/arrow-format/field.rb | Sutou Kouhei | 11 |
| ruby/red-arrow-format/lib/arrow-format/readable.rb | Sutou Kouhei | 11 |
| dev/tasks/linux-packages/apache-arrow-release/yum/Apache-Arrow.repo | Sutou Kouhei | 11 |
| cpp/src/arrow/flight/test_definitions.h | David Li | 10 |
| ruby/red-arrow-format/lib/arrow-format/bitmap.rb | Sutou Kouhei | 9 |
| ruby/red-arrow-format/lib/arrow-format/streaming-writer.rb | Sutou Kouhei | 9 |
| c_glib/Gemfile | Sutou Kouhei | 8 |
| c_glib/arrow-glib/datum.cpp | Sutou Kouhei | 8 |
| matlab/src/matlab/+arrow/+array/UInt16Array.m | Sarah Gilmore | 8 |
| matlab/src/matlab/+arrow/+array/UInt32Array.m | Sarah Gilmore | 8 |
| matlab/src/matlab/+arrow/+array/UInt8Array.m | Sarah Gilmore | 8 |
| matlab/src/matlab/+arrow/+type/TimestampType.m | Sarah Gilmore | 8 |
| c_glib/parquet-glib/metadata.cpp | Sutou Kouhei | 7 |
| c_glib/test/test-binary-array.rb | Sutou Kouhei | 7 |
| ruby/red-arrow-flight/lib/arrow-flight/loader.rb | Sutou Kouhei | 7 |
| ruby/red-arrow-format/lib/arrow-format/streaming-pull-reader.rb | Sutou Kouhei | 7 |
| c_glib/test/helper/flight-server.rb | Sutou Kouhei | 7 |
| c_glib/arrow-glib/orc-file-reader.cpp | Sutou Kouhei | 7 |
| ruby/red-arrow/test/helper.rb | Sutou Kouhei | 7 |
| c_glib/test/test-buffer.rb | Sutou Kouhei | 7 |
| c_glib/arrow-glib/data-type.h | Sutou Kouhei | 7 |
| cpp/src/arrow/compute/row/compare_test.cc | Rossi Sun | 7 |
| matlab/test/arrow/array/tUInt16Array.m | Sarah Gilmore | 7 |
| matlab/test/arrow/array/tUInt32Array.m | Sarah Gilmore | 7 |
| matlab/test/arrow/array/tUInt8Array.m | Sarah Gilmore | 7 |
| dev/archery/archery/crossbow/tests/fixtures/chat-report.txt | Raúl Cumplido | 6 |
| dev/archery/archery/templates/chat_nightly_report.txt.j2 | Raúl Cumplido | 6 |
| ruby/red-arrow-format/lib/arrow-format/schema.rb | Sutou Kouhei | 6 |
| ruby/Rakefile | Sutou Kouhei | 6 |
| ci/scripts/msys2_system_upgrade.sh | Sutou Kouhei | 6 |
| c_glib/test/test-struct-array.rb | Sutou Kouhei | 6 |
| cpp/src/arrow/csv/column_builder.h | Antoine Pitrou | 6 |
| cpp/src/arrow/util/memory.cc | Antoine Pitrou | 6 |
| cpp/src/arrow/util/bpacking_benchmark.cc | Antoine Prouvost | 6 |
| matlab/src/matlab/+arrow/+array/NumericArray.m | Sarah Gilmore | 6 |
| cpp/src/arrow/dataset/projector.h | Benjamin Kietzman | 6 |
| ruby/red-arrow-format/test/test-boolean-array.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-format/lib/arrow-format/error.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-flight-sql/test/test-client.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-format/lib/arrow-format/file-writer.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-format/red-arrow-format.gemspec | Sutou Kouhei | 5 |
| ruby/red-arrow/test/test-decimal128-array.rb | Sutou Kouhei | 5 |
| c_glib/test/parquet/test-row-group-metadata.rb | Sutou Kouhei | 5 |
| c_glib/arrow-dataset-glib/dataset-factory.cpp | Sutou Kouhei | 5 |
| c_glib/arrow-dataset-glib/partitioning.cpp | Sutou Kouhei | 5 |
| c_glib/arrow-glib/array-builder.hpp | Sutou Kouhei | 5 |
| c_glib/parquet-glib/metadata.hpp | Sutou Kouhei | 5 |
| ruby/red-arrow-dataset/lib/arrow-dataset/arrow-table-loadable.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-dataset/lib/arrow-dataset/loader.rb | Sutou Kouhei | 5 |
| ruby/red-arrow-dataset/test/test-arrow-table.rb | Sutou Kouhei | 5 |
| c_glib/test/test-boolean-data-type.rb | Sutou Kouhei | 5 |
| c_glib/test/test-string-array.rb | Sutou Kouhei | 5 |
| cpp/src/arrow/csv/fuzz.cc | Antoine Pitrou | 5 |
| cpp/src/arrow/util/fuzz_internal.cc | Antoine Pitrou | 5 |
| cpp/src/arrow/io/slow.cc | Antoine Pitrou | 5 |
| matlab/src/matlab/+arrow/+type/BooleanType.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Float32Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Float64Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Int16Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Int32Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Int64Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/Int8Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/UInt16Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/UInt32Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/UInt64Type.m | Sarah Gilmore | 5 |
| matlab/src/matlab/+arrow/+type/UInt8Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tBooleanType.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tFloat32Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tFloat64Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tInt16Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tInt32Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tInt64Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tInt8Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tUInt16Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tUInt32Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tUInt64Type.m | Sarah Gilmore | 5 |
| matlab/test/arrow/type/tUInt8Type.m | Sarah Gilmore | 5 |
| cpp/src/arrow/ipc/meson.build | William Ayd | 5 |
| dev/archery/archery/crossbow/tests/fixtures/chat-report-extra-message-failure.txt | Raúl Cumplido | 4 |
| dev/archery/archery/crossbow/tests/fixtures/chat-report-extra-message-success.txt | Raúl Cumplido | 4 |
| dev/archery/archery/ci/core.py | Raúl Cumplido | 4 |
| ruby/red-arrow-format/test/test-float32-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-float64-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-int16-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-int32-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-int64-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-int8-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-uint16-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-uint32-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-uint64-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/test/test-uint8-array.rb | Sutou Kouhei | 4 |
| ruby/red-arrow-format/Rakefile | Sutou Kouhei | 4 |
| ruby/red-arrow-format/lib/arrow-format/integration/json-reader.rb | Sutou Kouhei | 4 |
| ruby/red-arrow/lib/arrow/table-formatter.rb | Sutou Kouhei | 4 |
| ruby/red-arrow/lib/arrow/list-data-type.rb | Sutou Kouhei | 4 |
Primary owner = the author with the most commits to a file. Solely owned = files only that author has touched.
| Author | Files owned | Solely owned | Files touched |
|---|---|---|---|
| Sutou Kouhei | 1,380 | 707 | 2,325 |
| Antoine Pitrou | 565 | 88 | 1,699 |
| Wes McKinney | 315 | 29 | 1,019 |
| Sarah Gilmore | 286 | 143 | 349 |
| Raúl Cumplido | 195 | 62 | 679 |
| Neal Richardson | 181 | 10 | 500 |
| Nic Crane | 143 | 25 | 471 |
| Alenka Frim | 120 | 68 | 436 |
| Weston Pace | 103 | 22 | 480 |
| David Li | 102 | 17 | 598 |
| Krisztián Szűcs | 98 | 34 | 555 |
| justing-bq | 97 | 48 | 145 |
| Yosuke Shiro | 84 | 48 | 203 |
| mwish | 80 | 7 | 285 |
| Rossi Sun | 75 | 28 | 204 |
| William Ayd | 74 | 44 | 231 |
| Pindikura Ravindra | 72 | 2 | 149 |
| Benjamin Kietzman | 70 | 11 | 722 |
| Alina (Xi) Li | 61 | 16 | 131 |
| Romain François | 56 | 6 | 196 |
| Sten Larsson | 55 | 46 | 76 |
| Kevin Gurney | 51 | 37 | 198 |
| Joris Van den Bossche | 49 | 5 | 334 |
| Felipe Oliveira Carvalho | 48 | 24 | 281 |
| Rok Mihevc | 44 | 9 | 247 |
Files touched by the most people — shared code where changes are most likely to need coordination.
| File | Contributors | Primary owner | Owner share |
|---|---|---|---|
| python/pyarrow/includes/libarrow.pxd | 92 | Wes McKinney | 20.4% |
| cpp/cmake_modules/ThirdpartyToolchain.cmake | 91 | Sutou Kouhei | 32.7% |
| cpp/src/arrow/CMakeLists.txt | 85 | Antoine Pitrou | 21.5% |
| python/pyarrow/array.pxi | 85 | Wes McKinney | 16.7% |
| python/pyarrow/table.pxi | 70 | Wes McKinney | 17.4% |
| dev/tasks/tasks.yml | 69 | Sutou Kouhei | 29.4% |
| python/pyarrow/tests/test_array.py | 68 | Wes McKinney | 19.8% |
| cpp/CMakeLists.txt | 65 | Wes McKinney | 25.8% |
| python/pyarrow/_parquet.pyx | 60 | Wes McKinney | 24.0% |
| python/pyarrow/tests/test_dataset.py | 57 | Joris Van den Bossche | 24.4% |
| python/pyarrow/tests/test_compute.py | 57 | Rok Mihevc | 10.9% |
| python/pyarrow/types.pxi | 56 | Wes McKinney | 18.4% |
| docs/source/cpp/compute.rst | 56 | David Li | 22.5% |
| cpp/src/arrow/type.h | 53 | Wes McKinney | 32.0% |
| cpp/src/parquet/column_writer.cc | 51 | Antoine Pitrou | 15.6% |
| python/pyarrow/tests/test_table.py | 49 | Wes McKinney | 19.8% |
| python/pyarrow/_dataset.pyx | 49 | Joris Van den Bossche | 21.4% |
| cpp/thirdparty/versions.txt | 48 | Antoine Pitrou | 17.9% |
| docs/source/status.rst | 48 | Matt Topol | 18.2% |
| cpp/src/arrow/type.cc | 47 | Wes McKinney | 30.7% |
How Apache Arrow compares with other Apache projects →
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# .github/workflows/gitstats.yml
name: GitStats Report
on:
push:
branches: [main]
permissions:
contents: write
jobs:
gitstats:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v7
with:
fetch-depth: 0
- uses: shenxianpeng/gitstats-action@v1
with:
deploy-to-pages: true