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

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; SM-N986B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.85 Mobile Safari/537.36 OPR/66.2.3445.62346

Browser: Opera Mobile 66

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
Control	1051734000.0 Ops/sec
localStorage	547792.9 Ops/sec
sessionStorage	567073.8 Ops/sec
Read Array	767231.2 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