For loop: i++ vs. ++i vs. i+=1 (v4)

Revision 4 of this benchmark created on

Preparation HTML

<script>
  var Xlarge = 100000000;
  var Large = 1000000;
  var Medium = 10000;
  var Small = 100;
  
  function doNothing() {}
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
Post-Increment
for (var i = 0; i < Xlarge; i++) {
  doNothing();
}

for (var i = 0; i < Large; i++) {
  doNothing();
}

for (var i = 0; i < Medium; i++) {
  doNothing();
}

for (var i = 0; i < Small; i++) {
  doNothing();
}
ready
Pre-Increment
for (var i = 0; i < Xlarge; ++i) {
  doNothing();
}

for (var i = 0; i < Large; ++i) {
  doNothing();
}

for (var i = 0; i < Medium; ++i) {
  doNothing();
}

for (var i = 0; i < Small; ++i) {
  doNothing();
}
ready
Crockford's Delight
for (var i = 0; i < Xlarge; i += 1) {
  doNothing();
}

for (var i = 0; i < Large; i += 1) {
  doNothing();
}

for (var i = 0; i < Medium; i += 1) {
  doNothing();
}

for (var i = 0; i < Small; i += 1) {
  doNothing();
}
ready

Revisions

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