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"また、Pandasと同等の処理を書くことができるかつ、圧倒的に速いです。(下記の例では半分以下の時間で実行できている!)" }), "\n", _jsx(_components.p, { children: _jsx(_components.img, { src: "/images/blog46/image1.png", alt: "" }) }), "\n", _jsx(_components.p, { children: "Polarsについて覚える必要がありますが、sqlや、Rのdplyrみたいな感じで書けるので、慣れれば書きやすいです。" }), "\n", _jsx(_components.p, { children: "業務ではPolarsを使う人が多くないのでPandasで書いていますが、 コンペなどでは処理速度向上のためpolarsを使っています。" }), "\n", _jsx(_components.h3, { children: "並列化手法を使用する" }), "\n", _jsx(_components.p, { children: "PandasやPolarsのメソッドに実装されていないような複雑な処理でも、 並列化できる処理(特にgroup処理など)は、高速で実行することができます。" }), "\n", _jsx(_components.p, { children: "並列化手法のうち、おすすめなものを紹介します。" }), "\n", _jsxs(_components.ol, { children: ["\n", _jsx(_components.li, { children: _jsx(_components.a, { href: "https://nalepae.github.io/pandarallel/", children: "Pandarallel" }) }), "\n"] }), "\n", _jsx(_components.p, { children: "pandasのapply処理を並列化してくれます。簡単に実装でき、progress barまで出してくれるのでありがたい。" }), "\n", _jsxs(_components.ol, { start: "3", children: ["\n", _jsx(_components.li, { children: _jsx(_components.a, { href: "https://joblib.readthedocs.io/en/latest/", children: "Joblib" }) }), "\n"] }), "\n", _jsx(_components.p, { children: "listの内包表記を並列化する。進捗をテキストで表示できる。幅が広い。" }), "\n", _jsx(_components.p, { children: "以下は通常、pandarallel、Joblibそれぞれで実行したときの時間です。" }), "\n", _jsx(_components.p, { children: _jsx(_components.img, { src: "/images/blog46/image2.png", alt: "" }) }), "\n", _jsx(_components.p, { children: "処理はJoblibを少し変えていますが、ほぼ同じ処理です(0.01s待って集計する処理)" }), "\n", _jsx(_components.p, { children: "Google Colabで実装しているため、2workerしか使っていませんが、それでもかなり早くなります。 Colab以外でworkerが多いPCで実行すればもっと早くなりそうです。" }), "\n", _jsx(_components.p, { children: "JoblibとpandarallelはJoblibの方が速そうですが、処理が多くなった時はどうかわかりません。 pandarallelは簡単にかけて可読性もよく、結果も見やすいので最近はpandarallelを使用してます。" }), "\n", _jsx(_components.h3, { children: "まとめ" }), "\n", _jsx(_components.p, { children: "高速化できれば、時間が短縮できてより色々な手法が試せるようになります。 処理早いので業務でもPolarsがStandardになってくれないかなぁ(願望)" })] }); } function 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