Run results for: Math.pow(2,n) vs Table lookup?

Run details:

User agent: Mozilla/5.0 (iPad; CPU OS 14_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.94 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 96

Operating system: iOS 14.0

Device Platform: Tablet

Date tested: 2 years ago

Test name	Executions per second
Table lookup	16434352.0 Ops/sec
Math.pow	10038562.0 Ops/sec

Script Preparation code:

var POWERS = [
		1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16384,32768,
		65536,131072,262144,524288,1048576,2097152
		
];

Tests:

Table lookup
let p = 15; let x; if (p > 20) { x = Math.pow(2,p); } else { x = POWERS[20]; }
Math.pow
let p = 15; let x; x = Math.pow(2,p);