Run results for: new Date().toISOString() vs new Date().toLocaleString()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.4

Device Platform: Mobile

Date tested: 2 years ago

new Date().toISOString()

2.3M/s

new Date().toLocaleString()

30K/s

View exact numbers

Test name	Executions per second
✓ new Date().toISOString()	2,280,189 Ops/sec
new Date().toLocaleString()	29,770 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: