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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
Table lookup	11681200.0 Ops/sec
Math.pow	6886847.5 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
		
];

AخA
 
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:

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

 
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);
let p = 15;
let x;
x = Math.pow(2,p);