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NEON optimizations for ZIP reading (reconstruct and interleave) (#1348)
Pretty much straight copies from the SSE2/SSE4 SIMD code, just changed for NEON. Reading 310Mpix worth of ZIP compressed EXR files into memory, on Apple M1 Max (Clang 14, RelWithDebInfo build config): 7.50s -> 5.52s. "reconstruct" part goes 1.55s -> 0.35s, "interleave" 0.80s -> 0.04s. Signed-off-by: Aras Pranckevicius <aras@nesnausk.org>
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