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rust-cv / hwt

Hamming Weight Tree from the paper "Online Nearest Neighbor Search in Hamming Space"

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Use packed_simd to speed up FeatureHeap::add

vadixidav opened this issue · comments

commented

Profiling currently shows a lot of time is spent in FeatureHeap::add doing XOR, popcount, and comparations. We can speed this up with SIMD by doing the XOR, popcnt, and compares in parallel.