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…

Algorithms in Rust: This is the infamous fast inverse square root

Delta Thoughts - Quake III's Smartest Quasi-Square Root

Quake III & the reciprocal square root

Delphi – Fast Inverse Square Root – Quake 3 Arena

Řrřlog :: Improving the fast inverse square root

Computation, Free Full-Text

Evolutionary algorithm to find Quake III's fast inverse square

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

REVEALED: Quake III's SECRET Algorithm!

How Fast Inverse Square Root actually works - Preetham