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refactor[fsst]: take ArrayRef in fsst_compress, decide offset width upfront - #7900

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robert3005 merged 9 commits into
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mp/fsst-compress-refactor
Jun 22, 2026
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refactor[fsst]: take ArrayRef in fsst_compress, decide offset width upfront#7900
robert3005 merged 9 commits into
developfrom
mp/fsst-compress-refactor

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CodSpeed HQ / CodSpeed Performance Analysis failed Jun 22, 2026 in 0s

1 benchmark 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

⚡ 9 improved benchmarks
❌ 1 regressed benchmark
✅ 1571 untouched benchmarks
🆕 2 new benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation chunked_varbinview_into_canonical[(1000, 10)] 169 µs 205.9 µs -17.93%
Simulation chunked_bool_canonical_into[(1000, 10)] 27 µs 16.3 µs +66.21%
Simulation eq_pushdown_low_match 968.7 µs 786 µs +23.24%
Simulation chunked_varbinview_opt_canonical_into[(1000, 10)] 206.1 µs 169.6 µs +21.5%
Simulation eq_pushdown_high_match 1,063.9 µs 880.5 µs +20.83%
Simulation chunked_varbinview_opt_into_canonical[(1000, 10)] 219.4 µs 183 µs +19.95%
Simulation bitwise_not_vortex_buffer_mut[128] 244.4 ns 215.3 ns +13.55%
Simulation pushdown_compare[(10000, 16, 8)] 264.8 µs 239.3 µs +10.64%
Simulation bitwise_not_vortex_buffer_mut[1024] 304.7 ns 275.6 ns +10.58%
Simulation eq_i64_constant 318.9 µs 289.1 µs +10.32%
🆕 Simulation eq_pushdown_high_match_view N/A 882.1 µs N/A
🆕 Simulation eq_pushdown_low_match_view N/A 779.4 µs N/A

Tip

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Comparing mp/fsst-compress-refactor (a4b73a5) with develop (d53301e)

Open in CodSpeed