Run results for: sin vs fast sin

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36 Edg/151.0.0.0

Browser: Chrome 151

Operating system: Windows

Device Platform: Desktop

Date tested: one month ago

Benchmark engine: Benchmark.js

fast sin

1.2M/s

Math.sin

454K/s

View exact numbers

Test name	Executions per second
✓ fast sin	1,155,071 Ops/sec
Math.sin	454,231 Ops/sec

Script Preparation code:

const PI = Math.PI;
const TAU = PI * 2;
const B = 4 / PI;
const C = -4 / TAU;
var sin = x =>  {
    return (B * x + C * x * ((x < 0) ? -x : x));
};

Tests:

Math.sin
let k = []; for (let i = 0; i < 100; ++i) k.push(Math.sin(i));
fast sin
let k = []; for (let i = 0; i < 100; ++i) k.push(sin(i));