Run results for: var-let-const20

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

let

9.8M/s

var

9.6M/s

const

9.6M/s

View exact numbers

Test name	Executions per second
✓ let	9,819,665 Ops/sec
var	9,630,361 Ops/sec
const	9,602,191 Ops/sec

Script Preparation code:

function functionConst(arg) {
	const obj = {};
  	obj.fn = () => console.log(obj, arg);
  return obj;
}
function functionVar(arg) {
	var obj = {};
  	obj.fn = () => console.log(obj, arg);
  return obj;
}
 
function functionLet(arg) {
	let obj = {};
  	obj.fn = () => console.log(obj, arg);
  return obj;

}

Tests:

const
functionConst(Math.random())
let
functionLet(Math.random())
var
functionVar(Math.random())