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perf(parquet): decode def and rep levels concurrently via 2D grid#7

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vyasr wants to merge 1 commit into
opt/rle-chunked-expandfrom
opt/rle-def-rep-split
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perf(parquet): decode def and rep levels concurrently via 2D grid#7
vyasr wants to merge 1 commit into
opt/rle-chunked-expandfrom
opt/rle-def-rep-split

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@vyasr

@vyasr vyasr commented Jul 17, 2026

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Switch the kernel from a 1D to a 2D grid where the y axis determines whether to decode definition or repetition levels. That reduces some synchronization and local state.

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