for-of-vs-for-loop

JavaScript performance comparison

Test case created by Rick Waldron

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  this.vals = "x".repeat(1000).split("").map((_, i) => i);

};
</script>

Test runner

Warning! For accurate results, please disable Firebug before running the tests. (Why?)

Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
for-of
var collected = [];
for (var value of this.vals) {
  collected.push({ value: value });
}
collected.length = this.vals.length;

pending…
for-loop
var collected = [];
var length = this.vals.length;
var value = 0;

for (var i = 0; i < length; i++) {
  value = this.vals[i];
  collected.push({ value: value });
}
collected.length = this.vals.length;

pending…

Compare results of other browsers

Revisions

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

0 Comments