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並列化の吟味 #2

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Mr-Ojii opened this issue Jan 31, 2025 · 0 comments

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Mr-Ojii commented Jan 31, 2025 •

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現状で4重ループで一番重いここの並列化を行う

x, y, w にしか依存しない index の pix_info に読み書きをするだけなので並列化は容易に可能。

だが、ymax - ymin がある閾値以上でない (閾値は環境に拠る可能性が高い) 場合、並列化時のスレッド立てるオーバーヘッドのほうが大きくなるため、遅くなる可能性が高い。
ymax - ymin >= スレッド数 で判別するのが適切？

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