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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser: Firefox 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

new Date().toISOString()

2.0M/s

new Date().toLocaleString()

322K/s

View exact numbers

Test name	Executions per second
✓ new Date().toISOString()	2,012,794 Ops/sec
new Date().toLocaleString()	321,886 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: