fast-math

Fast, approximate versions of mathematical functions. Includes:

• Logarithms: log2,
• Exponentials: exp, exp2,
• Trigonometric functions: atan, atan2.

Documentation, crates.io.

lib.rs:

Fast, approximate versions of mathematical functions.

This crate includes implementations of "expensive" mathematical functions that are much faster, at the expense of some accuracy. All functions have good guarantees on accuracy to some degree (both relative and absolute).

Installation

Add this to your Cargo.toml

[dependencies]
fast-math = "0.1"

Examples

let x = 10.4781;
let approx = fast_math::log2(x);
let real = x.log2();
// they should be close
assert!((approx - real).abs() < 0.01);