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VarBinViewBuilder: support appending buffers directly into the builder storage - #9235

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robert3005 merged 3 commits into
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rk/varbinview-append-buffer
Aug 7, 2026
Merged

VarBinViewBuilder: support appending buffers directly into the builder storage#9235
robert3005 merged 3 commits into
developfrom
rk/varbinview-append-buffer

Skip null bytes in VarBinView buffer compaction

a9a9bdd
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CodSpeed HQ / CodSpeed Performance Analysis failed Aug 7, 2026

3 benchmarks regressed

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 11 improved benchmarks
❌ 3 regressed benchmarks
✅ 1963 untouched benchmarks
⏩ 8 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Simulation fsst_decompress_string 7.2 ms 8.3 ms -12.91%
❌ Simulation decompress_fsst[(10000, 4, 4)] 793.7 µs 899.8 µs -11.79%
❌ Simulation decompress_fsst[(10000, 4, 8)] 815.3 µs 921.3 µs -11.51%
⚡ Simulation decompress[u64, (1000, 16)] 134.9 µs 74 µs +82.25%
⚡ Simulation chunked_varbin_to_varbinview_builder[(10, 100)] 516.6 µs 329.8 µs +56.65%
⚡ Simulation chunked_varbin_into_canonical[(10, 100)] 696.1 µs 485 µs +43.52%
⚡ Simulation chunked_varbin_opt_to_varbinview_builder[(10, 100)] 790.7 µs 556.4 µs +42.11%
⚡ Simulation chunked_varbin_to_varbinview_builder[(500, 2)] 167.6 µs 119.1 µs +40.64%
⚡ Simulation chunked_varbin_into_canonical[(500, 2)] 178.3 µs 130.8 µs +36.38%
⚡ Simulation chunked_varbin_opt_to_varbinview_builder[(500, 2)] 166.1 µs 123.2 µs +34.87%
⚡ Simulation take[small_m/shuffled/primitive/nonnull/chunks=1024/indices=256] 2.5 ms 2.2 ms +14.53%
⚡ Simulation take[small_m/shuffled/primitive/nonnull/chunks=1024/indices=1000] 6.5 ms 5.7 ms +14.4%
⚡ Simulation take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=1000] 11.1 ms 9.7 ms +13.91%
⚡ Simulation take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=256] 3.6 ms 3.3 ms +10.82%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

Comparing rk/varbinview-append-buffer (a9a9bdd) with develop (0f0390a)2

Open in CodSpeed

Footnotes

  1. 8 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

  2. No successful run was found on develop (74a2b86) during the generation of this report, so 0f0390a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

View more details on CodSpeed HQ