MDEV-21543: Speed up VARCHAR pad space handling in multibyte collations#4625
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gkodinov merged 1 commit intoMariaDB:mainfrom Feb 19, 2026
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The change looks good. Please only undo changes in non-relevant lines. Thanks.
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Please also add a comment. Thanks.
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The cleanup patch is OK. Can you please squash it with the main commit? Thanks.
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Thank you for working on this! As Alexander has requested, can you please squash all of your commits into a single one and put up a commit message that conforms to https://github.com/MariaDB/server/blob/main/CODING_STANDARDS.md ?
- Scoped partial optimization for MDEV-21543 improving PAD SPACE collations for multibyte character sets in HA_KEYTYPE_VARTEXT1. - This keeps the old behavior for other cases until MDEV-38712 is resolved. - Benchmark: see zulip topic in the PR description - Results: - ~3.1% lower wall-clock time - ~2.1% fewer CPU cycles - ~0.5% fewer retired instructions - ~0.7% fewer branch mispredictions
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The patch is OK to push. Thanks!
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Scoped partial optimization, for MDEV-21543, improving PAD SPACE collations for multibyte character sets, for
HA_KEYTYPE_VARTEXT1only, while keeping the old behavior for other cases until MDEV-38712 is resolved. For more info refer to this Zulip topic: #New Members > MDEV-21543 hp_rec_key_cmp suboptimal comparison