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Stable 25.8 Backport of #86933 - RFC: Optimize MarkRanges by using devector over deque - #2637

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@zvonand zvonand commented Oct 22, 2026

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Backport of ClickHouse#86933

Changelog category (leave one):

  • Performance Improvement

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

Improves performance of fast queries with lots of parts in table (by optimizing MarkRanges by using devector over deque) (ClickHouse#86933 by @azat)

RFC: Optimize MarkRanges by using devector over deque
@zvonand zvonand added the backport Backport label Oct 22, 2026
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Workflow [PR], commit [8851860]

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