Run results for: localStorage and sessionStorage Speedtest

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.1.2

Device Platform: Mobile

Date tested: 2 years ago

Control

404.6M/s

localStorage

4.3M/s

sessionStorage

4.3M/s

View exact numbers

Test name	Executions per second
✓ Control	404,649,280 Ops/sec
localStorage	4,323,528 Ops/sec
sessionStorage	4,286,118 Ops/sec

Script Preparation code:

localStorage.setItem('foo', 'bar')
sessionStorage.setItem('foo', 'bar')

Tests:

Control
var FOO = 'bar';
localStorage
var FOO = localStorage.getItem('foo');
sessionStorage
var FOO = sessionStorage.getItem('foo');