isFinite (v3)

Revision 3 of this benchmark created by Qantas94Heavy on

Preparation HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<script>
  var n = Infinity;
  var isFinite2 = null;
  
  if ( $.browser.mozilla ) {
  isFinite2 = isFinite;
  } else {
  isFinite2 = function(n) {
  return (typeof(n) === 'number') && n === n && n !== Infinity && n !== -Infinity;
  }
  }
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
isFinite
var r = isFinite( n );
ready
manual check
// var r = (typeof(n) === 'number') && n === n && n !== Infinity && n !== -Infinity; // incorrect - no coercion of number

var r = +n;
r = !(r !== r || r === Infinity || r === -Infinity);
ready
browser specific
var r = $.browser.mozilla ? isFinite(n) : (n === n && n !== Infinity && n !== -Infinity);
ready
browser specific isFinite
var r = isFinite2( n );
ready
manual 2
var r = +n;
r = r === r && r !== Infinity && r !== -Infinity;
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.