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

Run details:

User agent: Mozilla/5.0 (Android 14; Mobile; rv:133.0) Gecko/133.0 Firefox/133.0

Browser: Firefox Mobile 133

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

var

9.7M/s

const

9.3M/s

let

9.2M/s

View exact numbers

Test name	Executions per second
✓ var	9,696,658 Ops/sec
const	9,316,615 Ops/sec
let	9,212,086 Ops/sec

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()