perf(physical-plan): optimize byte view append#21586
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kumarUjjawal wants to merge 2 commits intoapache:mainfrom
Open
perf(physical-plan): optimize byte view append#21586kumarUjjawal wants to merge 2 commits intoapache:mainfrom
kumarUjjawal wants to merge 2 commits intoapache:mainfrom
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martin-g
reviewed
Apr 13, 2026
| } | ||
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| let start_idx = self.views.len(); | ||
| self.views.extend(rows.iter().map(|&row| source_views[row])); |
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This could be moved at line 202 and this will re-use the iteration over rows.
| let start_idx = self.views.len(); | ||
| self.views.extend(rows.iter().map(|&row| source_views[row])); | ||
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| let mut pending = Vec::with_capacity(rows.len()); |
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This most probably will over-allocate because only the rows with more than 12 bytes will be appended. Maybe use half of the rows length as initial capacity and let it grow if needed ?!
| rows: &[usize], | ||
| ) { | ||
| let source_views = array.views(); | ||
| let mut pending = Vec::with_capacity(rows.len()); |
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Same - consider using a smaller initial capacity.
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I think half or rows.len() would be good as you said.
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Which issue does this PR close?
Rationale for this change
ByteViewGroupValueBuilder::vectorized_appenddid extraper-value work. It rebuilt views and copied long values one by one even when the input already had reusable byte views.What changes are included in this PR?
vectorized_appendextendon the no-null fast pathtake_nafter vectorized appendAre these changes tested?
Yes
Are there any user-facing changes?
No