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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

timestamp = Date.now();

3.7M/s

timestamp = new Date().toISOString();

2.7M/s

View exact numbers

Test name	Executions per second
✓ timestamp = Date.now();	3,744,315 Ops/sec
timestamp = new Date().toISOString();	2,681,098 Ops/sec

Script Preparation code:

var timestamp = null;

Tests: