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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 16_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 16

Operating system: iOS 16.5.1

Device Platform: Mobile

Date tested: 9 months ago

Test name	Executions per second
Control	521319100.0 Ops/sec
localStorage	8173470.0 Ops/sec
sessionStorage	5136840.0 Ops/sec
Read Array	6191731.0 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