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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Browser: Firefox 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

timestamp = Date.now();

16.1M/s

timestamp = new Date().toISOString();

3.3M/s

View exact numbers

Test name	Executions per second
✓ timestamp = Date.now();	16,075,407 Ops/sec
timestamp = new Date().toISOString();	3,347,357 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: