Info

check if --i>=0 is faster then i--

Preparation code

<script>
  var arr = (function() {
   var i = 0,
       ret = [];
   while (i++ < 100000) {
    ret[i] = i;
   }
   return ret;
  })();
</script>

Test runner

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Java applet disabled.

var i = arr.length,
    j;
while (i--) {
 j = i;
}

var i = arr.length,
    j;
while (--i >= 0) {
 j = i;
}

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