Quake III & the reciprocal square root

In the C source code of the famous game “Quake III — Arena” you can find an incredibly efficient piece of code that seems totally insane and incomprehensible! It is the code for computing the…

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

Exploring Quake 3's Fast Inverse Square Root

Exploring Quake 3's Fast Inverse Square Root

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

0x5f3759df and the fast inverse square root : r/programming

The Apache Groovy programming language - Blogs - Quake III Arena

REVEALED: Quake III's SECRET Algorithm!

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

Death of Quake 3's Inverse Square Root Hack, by Doug Foo

Behind the Performance of Quake 3 Engine: Fast Inverse Square Root

Cool Code - Quake 3 Fast InvSqrt() - Particl Digital

I implemented the infamous Fast Inverse Square Root function from

GitHub - MrGlockenspiel/Q_rsqrt-in-Rust: Rewriting the infamous