Underscore.each vs jQuery.each vs. for loop vs. nimble-foreach (v224)

Revision 224 of this benchmark created by Marc J. Schmidt on

Preparation HTML

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js">
</script>
<script src="//documentcloud.github.com/underscore/underscore-min.js">
</script>
<script>
  var pi = Math.PI,
      a = "t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t,t".split(","),
      e;
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
jQuery.each
$.each(a, function(index, val) {
  val = pi;
});
ready
good old for loop
for (var i = 0, len = a.length; i < len; i++) {
  a[i] = pi;
};
ready
underscore.each
_.each(a, function(item) {
  item = pi;
});
ready
do loop
var i = 0,
    len = a.length;
do {
  a[i] = pi;
} while (i++ < len);
ready
for each
for (var i in a) {
  a[i] = pi;
};
ready
pre-calc length for loop
var len = a.length,
    i = 0;
for (i; i < len; i++) {
  a[i] = pi;
};
ready
while loop
var i = -1;
while (a[++i] !== undefined) {
  a[i] = pi;
}
ready

Revisions

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