Speed up COPY FROM text/CSV parsing using SIMD

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ID 5952
Title Speed up COPY FROM text/CSV parsing using SIMD
CI (CFBot) Summary
Stats (from CFBot) Patch count: 1, First patch: +170−5, All patches: +170−5
Tags Performance
Created 2025-08-07 05:06:54
Last modified 2026-02-01 00:00:08 (3 days ago)
Latest email 2026-02-03 12:06:19 (12 hours ago)
Status
PG19-Final (2026-03-01 – 2026-03-31): Needs review
PG19-4 (2026-01-01 – 2026-01-31): Moved to different CF
PG19-2 (2025-09-01 – 2025-09-30): Moved to different CF
Target version 19
Authors Shinya Kato (shinyakato)
Reviewers Nathan Bossart (bossartn), Ayoub Kazar (kaz)Become reviewer
Committer Nathan Bossart (bossartn)
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Emails
Speed up COPY FROM text/CSV parsing using SIMD
First at 2025-08-07 01:48:30 by Shinya Kato <shinya11.kato at gmail.com>
Latest at 2026-02-03 12:06:19 by KAZAR Ayoub <ma_kazar at esi.dz>
Latest attachment (0001-COPY-from-SIMD-v3-with-line_buf-periodic-refill.patch) at 2026-01-31 16:20:58 from KAZAR Ayoub <ma_kazar at esi.dz>
    Attachment (0001-COPY-from-SIMD-v3-with-line_buf-periodic-refill.patch) at 2026-01-31 16:20:58 from KAZAR Ayoub <ma_kazar at esi.dz> (Patch: Yes)
    Attachment (proba-spec-chars-chunk.png) at 2026-01-22 19:32:43 from KAZAR Ayoub <ma_kazar at esi.dz> (Patch: No)
    Attachment (simd_copy_performance_2025_01_06.png) at 2026-01-06 20:05:05 from Manni Wood <manni.wood at enterprisedb.com> (Patch: No)
    Attachment (0005-Speed-up-COPY-TO-text-CSV-using-SIMD.patch) at 2025-12-24 15:07:55 from KAZAR Ayoub <ma_kazar at esi.dz> (Patch: Yes)
    Attachment (manni-simd-copy-bench-v1.2.1.sh) at 2025-12-12 23:09:05 from Manni Wood <manni.wood at enterprisedb.com> (Patch: No)
    Attachment (v4.2-0001-Speed-up-COPY-FROM-text-CSV-parsing-using-SIMD.patch) at 2025-12-10 11:59:41 from Nazir Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (v4.1-0001-Speed-up-COPY-FROM-text-CSV-parsing-using-SIMD.patch) at 2025-12-09 13:40:19 from Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (test.sh.txt) at 2025-12-06 01:39:56 from Manni Wood <manni.wood at enterprisedb.com> (Patch: No)
    Attachment (copyfromparse-constant.asm) at 2025-11-26 11:50:58 from KAZAR Ayoub <ma_kazar at esi.dz> (Patch: No)
    Attachment (v3-0001-Speed-up-COPY-FROM-text-CSV-parsing-using-SIMD.patch) at 2025-10-16 14:29:36 from Nazir Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (COPY-SIMD-add-heuristic-to-avoid-regression-on-sm.txt) at 2025-08-19 12:33:38 from Nazir Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (simd-copy-from-bench.sql) at 2025-08-14 14:59:55 from KAZAR Ayoub <ma_kazar at esi.dz> (Patch: No)
    Attachment (v2-0001-Speed-up-COPY-FROM-text-CSV-parsing-using-SIMD.patch) at 2025-08-13 06:21:06 from Shinya Kato <shinya11.kato at gmail.com> (Patch: Yes)
    Attachment (v2-0001-Feedback.txt) at 2025-08-11 08:52:25 from Nazir Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (Feedback.txt) at 2025-08-07 11:15:06 from Nazir Bilal Yavuz <byavuz81 at gmail.com> (Patch: Yes)
    Attachment (v1-0001-Speed-up-COPY-FROM-text-CSV-parsing-using-SIMD.patch) at 2025-08-07 01:48:30 from Shinya Kato <shinya11.kato at gmail.com> (Patch: Yes)
History
When Who What
2026-02-01 00:00:08 CFbot Moved from CF PG19-4 to CF PG19-Final
2025-11-18 20:52:28 Ayoub Kazar (kaz) Added kaz as reviewer
2025-11-18 15:11:11 Nathan Bossart (bossartn) Moved from CF PG19-2 to CF PG19-4
2025-11-18 15:10:31 Nathan Bossart (bossartn) Added bossartn as committer
2025-11-18 15:10:31 Nathan Bossart (bossartn) Added bossartn as reviewer
2025-11-18 14:19:20 Nazir Bilal Yavuz (nbyavuz) New status: Needs review
2025-10-19 12:38:50 Shinya Kato (shinyakato) Closed in commitfest PG19-2 with status: Withdrawn
2025-08-18 07:46:39 Shinya Kato (shinyakato) New status: Waiting on Author
2025-08-07 05:06:54 Shinya Kato (shinyakato) Attached mail thread CAOzEurSW8cNr6TPKsjrstnPfhf4QyQqB4tnPXGGe8N4e_v7Jig@mail.gmail.com
2025-08-07 05:06:54 Shinya Kato (shinyakato) Created patch record
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