I'm not sure if you're joking, but that hex number isn't a count. It's a referen... | Hacker News

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jsnell on Dec 9, 2011 | parent | context | favorite | on: Knuth and the Unix Way

I'm not sure if you're joking, but that hex number isn't a count. It's a reference to a specific instance of an elegant solution to a problem (the fast reciprocal square root function from Quake).

pjscott on Dec 9, 2011 [–]

For those who are curious, Wikipedia has a fascinating explanation, and the C code in question:

http://en.wikipedia.org/wiki/Fast_inverse_square_root

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