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

Run details:

User agent: Mozilla/5.0 (Android 11; Mobile; rv:130.0) Gecko/130.0 Firefox/130.0

Browser: Firefox Mobile 130

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

let

12.8M/s

const

12.8M/s

var

12.6M/s

View exact numbers

Test name	Executions per second
✓ let	12,831,543 Ops/sec
const	12,828,879 Ops/sec
var	12,573,501 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()