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Broaden the string-to-Arrow benchmarks - #9503

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Broaden the string-to-Arrow benchmarks#9503
robert3005 wants to merge 4 commits into
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rk/string-arrow-benches

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@robert3005

@robert3005 robert3005 commented Aug 20, 2026

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Add string arrow export to microbenchmarks

Rework `vortex-arrow`'s string export benchmarks into a matrix over encoding
(offset, view, FSST, OnPair, Zstd), structure (flat, dict, chunked), operator
(identity, filter, take, slice, mask, zip), and nullability, exported to both
Arrow offset and view layouts, plus the same cases appended directly into
`VarBinBuilder` and `VarBinViewBuilder`.

Add a `string_to_arrow` benchmark in `vortex` that measures the end-to-end file
scan producing Arrow offset arrays, so the export is also covered with data laid
out by the default compressor rather than by hand.

Signed-off-by: Robert Kruszewski <github@robertk.io>
@robert3005 robert3005 added the changelog/chore A trivial change label Aug 20, 2026
Signed-off-by: Robert Kruszewski <github@robertk.io>
Signed-off-by: Robert Kruszewski <github@robertk.io>
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codspeed-hq Bot commented Aug 20, 2026

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Merging this PR will degrade performance by 10.07%

⚠️ 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.

❌ 1 regressed benchmark
✅ 1955 untouched benchmarks
⏩ 517 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation compress_fsst[(500, 64, 8)] 526.2 µs 585.1 µs -10.07%

Tip

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


Comparing rk/string-arrow-benches (90c6924) with develop (604cd33)

Open in CodSpeed

Footnotes

  1. 517 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.

Signed-off-by: Robert Kruszewski <github@robertk.io>
@robert3005
robert3005 enabled auto-merge (squash) August 20, 2026 17:06
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