Run results for: localStorage vs sessionStorage vs Reading a Hardcoded Array Speedtest

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; Redmi Note 7 Pro Build/PKQ1.181203.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/102.0.5005.125 Mobile Safari/537.36

Browser: Chrome Mobile 102

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Control	831026000.0 Ops/sec
localStorage	525717.9 Ops/sec
sessionStorage	510431.3 Ops/sec
Read Array	585363.4 Ops/sec

Script Preparation code:

localStorage.setItem('foo', 'bar')
sessionStorage.setItem('foo', 'bar')
var ARR = ['bar'];

Tests:

Control
var FOO = 'bar';
localStorage
var FOO = localStorage.getItem('foo');
sessionStorage
var FOO = sessionStorage.getItem('foo');
Read Array
var FOO = ARR[Math.floor(Math.random() * ARR.length)]

Run results for: localStorage vs sessionStorage vs Reading a Hardcoded Array Speedtest

Control

localStorage

sessionStorage

Read Array