perf: Improve performance of to_hex (> 2x)
#19503
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andygrove
changed the title
to_hexto_hex by 2x
Dandandan
reviewed
Dec 26, 2025
| ); | ||
| } | ||
| result.append_value(""); | ||
| let hex_str = value.to_hex(&mut buffer); |
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This could be made faster by handling the values separately from the nulls / avoiding the builder API.
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Thanks, it is even faster now! I updated the benchmark results in the PR description.
andygrove
changed the title
to_hex by 2xto_hex (> 2x)
Jefffrey
approved these changes
Dec 26, 2025
| // Start with offset 0 | ||
| offsets.push(0); | ||
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| // Process all values directly (including null slots - we write empty strings for nulls) |
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nit: I don't think this code is writing empty strings for nulls, it seems to process whatever value is in the null slot normally
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Which issue does this PR close?
N/A
Rationale for this change
What changes are included in this PR?
Avoid string allocations and re-use a mutable buffer.
Are these changes tested?
Are there any user-facing changes?