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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Firefox/52.0

Browser: Firefox 52

Operating system: Mac OS X 10.12

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
performance.mark	1357429.0 Ops/sec
Date.now	1400790.0 Ops/sec
performance.mark + performance.measure	689895.9 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')