failed-fastInverseSqrtJS/index.js

//fast inverse sqrt
function fisqrt(number) {
    const threehalfs = 1.5;
    const x2 = number * 0.5;
    let i = new Float32Array(1);
    i[0] = number;
    let y = new Int32Array(i.buffer);
    y = threehalfs - (x2 * y * y);
    y = Math.abs(y);
    y = (y / 1000000000000000000);
    y = (y - ((Math.floor(y) / 10) / (threehalfs * number))) / 1.55;
    y = Math.round(y * 100) / 100;
    return y;
}

//manual sqrt
function msqrt(number) {
    for (var i = 0; i * i <= number; i++) {
        if (i * i === number)
            return i;
   }
   return number;
}

//square
function sq(number) {
    return number * number;
}