Run results for: localStorage and sessionStorage Speedtest

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/139.0.7258.76 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 139

Operating system: iOS 18.6.1

Device Platform: Mobile

Date tested: one year ago

Control

514.2M/s

sessionStorage

5.5M/s

localStorage

5.4M/s

View exact numbers

Test name	Executions per second
✓ Control	514,177,312 Ops/sec
sessionStorage	5,487,768 Ops/sec
localStorage	5,396,462 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');