Info

Compare the fastest ways to load a date from a number into a date object.

Preparation code

<script>
  var nums = [];
  for (var i = 0; i < 1000; i++) {
    nums[i] = Date.now;
  }

  var reuse_date = new Date();
</script>

Test runner

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var len = nums.length;
var d;
for (var i = 0; i < len; i++) {
  d = new Date(nums[i]);
}

var len = nums.length;
var d = reuse_date;
for (var i = 0; i < len; i++) {
  d.setTime(nums[i]);
}

var len = nums.length;
var d;
for (var i = 0; i < len; i++) {
  d = nums[i];
}

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Paul on 7th November 2012
• Revision 3: published on 1st March 2013

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