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new 6fe0b1904bb [improvement](pk lookup) Avoid copying segment key bounds
(#67618)
6fe0b1904bb is described below
commit 6fe0b1904bb408d0fcacfac7ee0a9e67d75f0f40
Author: foxtail463 <[email protected]>
AuthorDate: Wed Sep 9 11:40:54 2026 +0800
[improvement](pk lookup) Avoid copying segment key bounds (#67618)
Primary-key lookup copied each rowset’s segment key bounds into a
temporary vector before pruning candidate segments. This caused repeated
allocation and protobuf object copying on the lookup hot path, with
overhead increasing alongside the number of segments.
Co-authored-by: yangtao555 <[email protected]>
---
be/src/storage/tablet/base_tablet.cpp | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/be/src/storage/tablet/base_tablet.cpp
b/be/src/storage/tablet/base_tablet.cpp
index c4a487f80ce..2084b3abbb3 100644
--- a/be/src/storage/tablet/base_tablet.cpp
+++ b/be/src/storage/tablet/base_tablet.cpp
@@ -482,8 +482,7 @@ Status BaseTablet::lookup_row_key(const Slice& encoded_key,
TabletSchema* latest
delete_bitmap == nullptr ? _tablet_meta->delete_bitmap_ptr() :
delete_bitmap;
for (size_t i = 0; i < specified_rowsets.size(); i++) {
const auto& rs = specified_rowsets[i];
- std::vector<KeyBoundsPB> segments_key_bounds;
- rs->rowset_meta()->get_segments_key_bounds(&segments_key_bounds);
+ const auto& segments_key_bounds =
rs->rowset_meta()->get_segments_key_bounds();
int num_segments = cast_set<int>(rs->num_segments());
// MOW lookup requires per-segment bounds. Aggregation must be disabled
// for MOW writers, but enforce at runtime too — indexing
segments_key_bounds[j]
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