Run results for: Date.now() vs Performance.measure()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.10 Safari/537.36 OPR/44.0.2444.0 (Edition developer)

Browser: Opera 44

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
performance.mark	229129.1 Ops/sec
Date.now	489322.5 Ops/sec
performance.mark + performance.measure	87512.1 Ops/sec

Script Preparation code:

var times = [];

Tests:

performance.mark
var i = Math.random() + '' + Date.now(); performance.mark(i + 'start'); performance.mark(i + 'end' );
Date.now
var i = Math.random() + '' + Date.now(); times.push(Date.now() + 'start' + i); times.push(Date.now() + 'end' + i);
performance.mark + performance.measure
var i = Math.random() + '' + Date.now(); performance.mark(i + 'start'); performance.mark(i + 'end' ); performance.measure(i, i + 'start', i + 'end')

Run results for: Date.now() vs Performance.measure()

Performance measure can be slow

performance.mark

Date.now

performance.mark + performance.measure