for vs forEach vs for-of

JavaScript performance comparison

Revision 589 of this test case created by Andrey Bartashevitch

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  let values = Array.from({length: 10000}, (v, k) => k+1);
  let sum = 0;
  
  let add = function(x) {
      sum += x;
  }

        
  };
          



        Benchmark.prototype.teardown = function() {

          
  sum = 0;
  values = [];

        
  };

      
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
for-of-callback 
for (let v of values) {
    add(v);
}
 pending…
forEach 
values.forEach((v) => {
    sum += v;
})
 pending…
forEach-callback 
values.forEach((v) => {
    add(v);
})
 pending…
for 
for (let i = 0, l = values.length; i < l; i++) {
    sum += values[i];
}
 pending…
for-of 
for (let v of values) {
    sum += v;
}
 pending…
for-callback 
for (let i = 0, l = values.length; i < l; i++) {
    add(values[i]);
}
 pending…

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