Run results for: fast floor vs floor js vs unsafe floor

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:99.0) Gecko/20100101 Firefox/99.0

Browser: Firefox 99

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
floor	1012067264.0 Ops/sec
fast floor	354553920.0 Ops/sec
unsafe floor	965839296.0 Ops/sec

Script Preparation code:

var mathFloor = Math.floor;
var random = Math.random;
var unsafeFloor = n => n | 0;
var fastFloor = n => {
    if (n >= 0 && n < 0x80000000) {
      return n | 0;
    }
    if (n > -0x80000000 && n < 0) {
      return (n - 1) | 0;
    }
    return mathFloor(n);
};

Tests:

floor
mathFloor(random()*10);
fast floor
fastFloor(random()*10);
unsafe floor
unsafeFloor(random()*10);