Add DSP (Dynamic Superblock Pruning) sparse index with avx 512SIMD optimizations#1471

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lyang24 wants to merge 9 commits intozilliztech:sparse_dsp_devfrom

Commits on Mar 1, 2026

Add SPARSE_DSP as standalone index type with Dynamic Superblock Pruning

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Commits on Mar 14, 2026

DSP fixes: eta subblock pruning, top-gamma backstop, benchmark

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benchmark: add failed query diagnostics, finer eta/gamma sweeps

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Add dsp_kth_init param to diagnose threshold initialization bias

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Remove dead u16_threshold variable

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Add kth_alpha calibration, rename DSP-H/DSP-T decomposition

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Rename DSP safe -> DSP default in benchmark labels

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Add explicit DSP mode selection: legacy/dsp/lsp0/lsp1/lsp2

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Commits on Mar 15, 2026

Add chunk-compressed block-max and stride-specific SIMD kernels

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