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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101 Firefox/83.0

Browser: Firefox 83

Operating system: Linux

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Date.now()	3849475.0 Ops/sec
new Date().getTime();	3371796.0 Ops/sec
performance.now()	2338388.0 Ops/sec

Website performance monitoring

Script Preparation code:

var timestamp = null;

Tests:

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