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

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:124.0) Gecko/124.0 Firefox/124.0

Browser: Firefox Mobile 124

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

var

19.1M/s

const

19.0M/s

let

18.9M/s

View exact numbers

Test name	Executions per second
✓ var	19,126,258 Ops/sec
const	19,035,084 Ops/sec
let	18,917,784 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()