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Machine LearningAdvent Calendar 2012

Day 11

bit vector + popcntでバイナリ素性のk-NN分類器を高速化する

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こんばんは @sleepy_yoshi です.Machine Learning Advent Calendar 2012 の 11日目を担当します.サモア時間ではまだ12月11日なので間に合いましたね.今日はバイナリ素性ベクトルの内積計算にSSE4.2のpopcnt命令を用いて高速化することでk-NN分類器を高速化する話について紹介します.

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