Run results for: const vs var vs let - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser: Chrome 84

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
const num	827809800.0 Ops/sec
const string	821185800.0 Ops/sec
var num	830204000.0 Ops/sec
var string	828862400.0 Ops/sec
let num	809622400.0 Ops/sec
let string	833258400.0 Ops/sec

Website performance monitoring

Tests:

const num
const a = 12109203910293019120392342342;
const string
const a = "12109203910293019120392342342";
var num
var a = 12109203910293019120392342342;
var string
var a = "12109203910293019120392342342";
let num
let a = 12109203910293019120392342342;
let string
const a = "12109203910293019120392342342";