Run results for: Quick Sin Cos vs Math Sin Cos vs Fastest

Run details:

User agent: Mozilla/5.0 (Linux; Android 13; SM-F926B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 108

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Math	2882272.8 Ops/sec
Faster	4141521.5 Ops/sec
Fastest	945216.6 Ops/sec

Script Preparation code:

let factorialize = function (num) {
    if (num === 0 || num === 1)
        return 1;
    for (let i = num - 1; i >= 1; i--) {
        num *= i;
    }
    return num;
}

let FACT_2 = 1 / factorialize(2);
let FACT_3 = 1 / factorialize(3);
let FACT_4 = 1 / factorialize(4);
let FACT_5 = 1 / factorialize(5);
let FACT_6 = 1 / factorialize(6);
let FACT_7 = 1 / factorialize(7);

const HALF_PI = Math.PI * 0.5;
const DOUBLE_PI = Math.PI * 2;

var mysin = function (angle)
{
    let pow2 = angle * angle;
    let pow4 = pow2 * pow2;
    let pow6 = pow4 * pow2;
    return 1 - pow2 * FACT_2 + pow4 * FACT_4 - pow6 * FACT_6;
}

var mycos = function (angle)
{
    return mysin(angle + HALF_PI);
}

var fastSin = function (x)
{
  if (x < -Math.PI)
        x += DOUBLE_PI;
    else if (x > Math.PI)
            x -= DOUBLE_PI;

    if (x < 0)
        return 1.27323954 * x + 0.405284735 * x * x;
    else
        return 1.27323954 * x - 0.405284735 * x * x;
}

var fastCos = function (x)
{
  return fastSin(x + HALF_PI);
}

Tests:

Math
Math.cos(0.4292); Math.sin(0.2321);
Faster
mycos(0.4292); mysin(0.2321);
Fastest
fastCos(0.4292); fastSin(0.2321);

Run results for: Quick Sin Cos vs Math Sin Cos vs Fastest

Math

Faster

Fastest