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

Run details:

User agent: Mozilla/5.0 (Android 15; Mobile; rv:137.0) Gecko/137.0 Firefox/137.0

Browser: Firefox Mobile 137

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

var

16.7M/s

let

16.2M/s

const

15.6M/s

View exact numbers

Test name	Executions per second
✓ var	16,733,053 Ops/sec
let	16,226,407 Ops/sec
const	15,586,661 Ops/sec

Tests:

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