native vs typed js array speed

JavaScript performance comparison

Revision 39 of this test case created by

Preparation code

<script>
  var arraySize = 8000;
  var typedArray = new Int32Array(4 * arraySize);
  var nativeArray = new Array(arraySize);
  window.X_RUNS = 0;
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Native array
var sum = 0;
//Write
for (var i = 0; i < arraySize; i++) {
 nativeArray[i] = i;
}

//Read
for (var i = 0; i < arraySize; i++) {
 sum += nativeArray[i];
}
if (sum != 31996000) {
  throw "failed sum: " + sum;
}
window.X_RUNS++;
pending…
Typed array
var sum = 0;
//Write
for (var i = 0; i < arraySize; i++) {
 typedArray[i] = i;
}

//Read
for (var i = 0; i < arraySize; i++) {
 sum += typedArray[i];
}
if (sum != 31996000) {
  throw "failed sum: " + sum;
}
window.X_RUNS++;
pending…

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