はてなブックマーク - Speeding up `atan2f` by 50x https://b.hatena.ne.jp/entry/s/mazzo.li/posts/vectorized-atan2.html 2021-08-16 Speeding up atan2f by 50x \mathrm{atan2} is an important but slow trigonometric function. However, if we’re working with batches of points and willing to live with tiny errors, we can pr... zu2 https://b.hatena.ne.jp/zu2/20250515#bookmark-4707034580023516994 2025-05-14T17:16:11Z sakito0902 https://b.hatena.ne.jp/sakito0902/20210820#bookmark-4707034580023516994 2021-08-20T12:27:31Z HotEntry アルゴリズム xef https://b.hatena.ne.jp/xef/20210820#bookmark-4707034580023516994 2021-08-20T09:22:12Z Algorithm Math kareobana https://b.hatena.ne.jp/kareobana/20210818#bookmark-4707034580023516994 2021-08-18T11:53:55Z c++ yosuke_furukawa https://b.hatena.ne.jp/yosuke_furukawa/20210818#bookmark-4707034580023516994 atan2 を 50 倍速くした話。 Horner法を使う、 ベクター化してSIMD効かせる、比較回数減らす、などなど。 2021-08-18T01:57:28Z teppey https://b.hatena.ne.jp/teppey/20210818#bookmark-4707034580023516994 2021-08-18T01:21:37Z notae https://b.hatena.ne.jp/notae/20210818#bookmark-4707034580023516994 2021-08-18T01:16:02Z Performance Math Algorithm ktsujister https://b.hatena.ne.jp/ktsujister/20210818#bookmark-4707034580023516994 2021-08-17T15:52:45Z tasukuchan https://b.hatena.ne.jp/tasukuchan/20210817#bookmark-4707034580023516994 2021-08-17T13:28:57Z