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fsst opt DO NOT MERGE#6996

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joseph-isaacs wants to merge 12 commits into
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claude/optimize-fsst-compression-KgJdu
Closed

fsst opt DO NOT MERGE#6996
joseph-isaacs wants to merge 12 commits into
developfrom
claude/optimize-fsst-compression-KgJdu

feat(fsst): remove min_count pre-filter in favor of gain-based selection

280a766
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CodSpeed HQ / CodSpeed Performance Analysis failed Mar 17, 2026 in 0s

Performance Regression: -84.28%

⚡ 14 improved benchmarks
❌ 17 regressed benchmarks
✅ 978 untouched benchmarks
🆕 44 new benchmarks
⏩ 1515 skipped benchmarks1

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation chunked_canonicalize_into[(1000, 100, 16, 64)] 23.9 ms 19.1 ms +25.34%
Simulation chunked_canonicalize_into[(1000, 100, 16, 16)] 20.5 ms 14.8 ms +38.14%
Simulation chunked_into_canonical[(1000, 100, 16, 16)] 20.8 ms 15.2 ms +36.88%
Simulation chunked_canonicalize_into[(1000, 50, 8, 16)] 8.9 ms 6.7 ms +33.22%
Simulation chunked_canonicalize_into[(1000, 50, 8, 4)] 7.8 ms 6.8 ms +13.71%
Simulation chunked_canonicalize_into[(1000, 50, 8, 64)] 10.5 ms 7.3 ms +43.18%
Simulation chunked_into_canonical[(1000, 50, 8, 16)] 9.1 ms 6.9 ms +31.87%
Simulation chunked_into_canonical[(1000, 100, 16, 64)] 24.2 ms 19.3 ms +25.14%
Simulation chunked_into_canonical[(1000, 50, 8, 4)] 8 ms 7.1 ms +13.19%
Simulation chunked_into_canonical[(1000, 50, 8, 64)] 10.8 ms 7.6 ms +41.51%
Simulation train_compressor[(1000, 16, 4)] 4.2 ms 9.6 ms -56.22%
Simulation train_compressor[(1000, 4, 4)] 1.9 ms 3.2 ms -41.58%
Simulation train_compressor[(1000, 16, 8)] 4.2 ms 8 ms -47.02%
Simulation train_compressor[(1000, 64, 4)] 4.2 ms 17.1 ms -75.31%
Simulation train_compressor[(10000, 4, 4)] 4.9 ms 20.7 ms -76.4%
Simulation train_compressor[(10000, 16, 4)] 4.8 ms 30.1 ms -84.06%
Simulation train_compressor[(10000, 16, 8)] 4.8 ms 30.8 ms -84.28%
Simulation train_compressor[(1000, 64, 8)] 4.3 ms 16.7 ms -74.17%
Simulation train_compressor[(1000, 4, 8)] 2 ms 3.6 ms -43.91%
Simulation eq_canonicalize_low_match 30.9 ms 26.4 ms +17.26%
... ... ... ... ... ...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.


Comparing claude/optimize-fsst-compression-KgJdu (280a766) with develop (b921999)

Open in CodSpeed

Footnotes

  1. 1515 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.