Run results for: Date.now() vs new Date().getTime() vs performance.now()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.6.1 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 15

Operating system: iOS 15.6.1

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Date.now()	3409351.0 Ops/sec
new Date().getTime();	3365949.0 Ops/sec
performance.now()	3249493.0 Ops/sec

Script Preparation code:

var timestamp = null;

Tests:

Date.now()
timestamp = Date.now();
new Date().getTime();
timestamp = new Date().getTime();
performance.now()
timestamp = performance.now()

Run results for: Date.now() vs new Date().getTime() vs performance.now()

Date.now()

new Date().getTime();

performance.now()