Run results for: Date.parse vs custom

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0

Browser: Firefox 54

Operating system: Mac OS X 10.12

Device Platform: Other

Date tested: 6 years ago

Test name	Executions per second
Date.parse	3857913.0 Ops/sec
custom	1451274.0 Ops/sec

Script Preparation code:

var dateString = '2000-01-25';

function parseDate(str) {
  const dateValues = str.split('-');

  return new Date(dateValues[0], dateValues[1] - 1, dateValues[2]);
}

Tests:

Date.parse
var parsedDate = new Date(Date.parse(dateString));
custom
var parsedDate = parseDate(dateString);