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

Run details:

User agent: Mozilla/5.0 (Android 10; Mobile; rv:105.0) Gecko/105.0 Firefox/105.0

Browser: Firefox Mobile 105

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
var	10087760.0 Ops/sec
let	8449934.0 Ops/sec
const	8462742.0 Ops/sec
sloppy	5366207.0 Ops/sec

Website performance monitoring

Tests:

var
var g = { e: [] } g.o = function(x) { g.e.push(...[1,2,3]) } g.o()
let
let g = { e: [] } g.o = function(x) { g.e.push(...[1,2,3]) } g.o()
const
const g = { e: [] } g.o = function(x) { g.e.push(...[1,2,3]) } g.o()
sloppy
g = { e: [] } g.o = function(x) { g.e.push(...[1,2,3]) } g.o()