Run results for: const vs let vs var (fixed) 2 - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 months ago

Test name	Executions per second
var	26839470.0 Ops/sec
let	23416050.0 Ops/sec
const	23593240.0 Ops/sec

Website performance monitoring

Tests:

var
var g = []; var f = function(x) { g.push(1,2,3) }; f()
let
let g = []; let f = function(x) { g.push(1,2,3) }; f()
const
const g = []; const f = function(x) { g.push(1,2,3) }; f()