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Add an OptimizeFn to re-pack arrays prior to compression #1798

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gatesn opened this issue Jan 3, 2025 · 0 comments

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gatesn commented Jan 3, 2025

Examples where this is useful typically involve sliced arrays:

DictArray - remove unused values from the dictionary, and also sort values by frequency (better cache locality for decompression)
BooleanArray - make sure bools are zero-aligned, instead of starting half way through a byte
VarBinView - remove unused strings from the data buffers

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