quake3-inv-sqrt-benchmark (0x5F3759DF)

Benchmarking std::f32 inverse square root and Quake III Arena inverse square root.

Quake III Arena Q_rsqrt source code

Wikipedia

Environment

CPU: Intel i9-9880H (16) @ 2.30GHz

rustc 1.53.0 (53cb7b09b 2021-06-17)

Run

cargo bench

Results

Benchmarked on loop from 0 to LIMIT.

const LIMIT: i32 = 1000000;

The numbers are expressed in US notation.

Name	Median	Deviation
tests::bench_quake	936,146 ns/iter	93,941 ns/iter
tests::bench_std	1,352,039 ns/iter	127,779 ns/iter