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Better fixed-width buffer filtering - #8723

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rk/filterbuffer
Open

Better fixed-width buffer filtering#8723
robert3005 wants to merge 7 commits into
developfrom
rk/filterbuffer

pshufb compress kernels for 1/2-byte elements on x86

b471442
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CodSpeed HQ / CodSpeed Performance Analysis failed Jul 28, 2026 in 0s

2 benchmarks regressed

⚡ 21 improved benchmarks
❌ 2 regressed benchmarks
✅ 1826 untouched benchmarks
⏩ 46 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation random_i16[0.01] 27.2 µs 36.5 µs -25.45%
Simulation random_i64[0.01] 28.7 µs 35.5 µs -18.99%
Simulation patterns_i128[Contiguous] 234.3 µs 17.6 µs ×13
Simulation random_i8[0.5] 81.6 µs 42.3 µs +93.1%
Simulation random_i8[0.8] 90.6 µs 50.6 µs +79.12%
Simulation random_i64[0.8] 277.7 µs 167.7 µs +65.58%
Simulation random_i16[0.8] 101.5 µs 67 µs +51.52%
Simulation patterns_i128[Runs] 244.5 µs 165.7 µs +47.57%
Simulation random_i16[0.5] 89.5 µs 62.7 µs +42.78%
Simulation random_i64[0.5] 204.7 µs 147.8 µs +38.54%
Simulation random_i32[0.8] 127.9 µs 93.3 µs +37.11%
Simulation random_i128[0.8] 388.6 µs 283.5 µs +37.1%
Simulation random_i32[0.5] 113.7 µs 85.1 µs +33.65%
Simulation random_i128[0.5] 289.9 µs 218 µs +32.95%
Simulation random_i8[0.95] 66.2 µs 50.8 µs +30.34%
Simulation patterns_i128[Random] 289.9 µs 226.1 µs +28.25%
Simulation random_i256[0.8] 638.9 µs 533.1 µs +19.84%
Simulation random_i256[0.5] 445.1 µs 373.3 µs +19.22%
Simulation random_i16[0.95] 80.6 µs 68.2 µs +18.07%
Simulation take_filter_primitive_large_random_mask_random_indices[(12500, 25000)] 366 µs 311.8 µs +17.36%
... ... ... ... ... ...

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

Tip

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


Comparing rk/filterbuffer (b471442) with develop (28d327c)

Open in CodSpeed

Footnotes

  1. 46 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.