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As mentioned in the article, it reminds me of the 0x5f3759df fast inverse square root used in Quake III Arena!

https://medium.com/hard-mode/the-legendary-fast-inverse-squa...

This is where I really see CS as being close to mathematics.

Ask me how I know you didn’t read the article :)

> As mentioned in the article

Touché, I edited it. I still thought it's worth keeping the comment because people might not always realise how useful these hacks can be when performance is important e.g. games.

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