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

17.3M/s

let

16.5M/s

const

15.7M/s

View exact numbers

Test name	Executions per second
✓ var	17,267,940 Ops/sec
let	16,523,290 Ops/sec
const	15,698,811 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()