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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:144.0) Gecko/20100101 Firefox/144.0

Browser: Firefox 144

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Benchmark engine: Benchmark.js

let

50.5M/s

var

50.0M/s

const

49.9M/s

View exact numbers

Test name	Executions per second
✓ let	50,515,608 Ops/sec
var	50,010,008 Ops/sec
const	49,885,412 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()