Info

Test the performance of typed arrays vs normal arrays

Preparation code

<script>
  var N = 100000;
  var arr = new Array(N),
      i8arr = new Int8Array(N),
      ui8arr = new Uint8Array(N),
      i16arr = new Int16Array(N),
      ui16arr = new Uint16Array(N),
      i32arr = new Int32Array(N),
      ui32arr = new Uint32Array(N),
      f32arr = new Float32Array(N),
      f64arr = new Float64Array(N);
  
  var i;
  for (i = 0; i < N; i++) {
   arr[i] = i;
   i8arr[i] = i;
   ui8arr[i] = i;
   i16arr[i] = i;
   ui16arr[i] = i;
   i32arr[i] = i;
   ui32arr[i] = i;
   f32arr[i] = i;
   f64arr[i] = i;
  }
</script>

Test runner

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var i;
for (i = 0; i < N; i++) {
 arr[i] = arr[i] * arr[i];
}

var i;
for (i = 0; i < N; i++) {
 i8arr[i] = i8arr[i] * i8arr[i];
}

var i;
for (i = 0; i < N; i++) {
 ui8arr[i] = ui8arr[i] * ui8arr[i];
}

var i;
for (i = 0; i < N; i++) {
 i16arr[i] = i16arr[i] * i16arr[i];
}

var i;
for (i = 0; i < N; i++) {
 ui16arr[i] = ui16arr[i] * ui16arr[i];
}

var i;
for (i = 0; i < N; i++) {
 i32arr[i] = i32arr[i] * i32arr[i];
}

var i;
for (i = 0; i < N; i++) {
 ui32arr[i] = ui32arr[i] * ui32arr[i];
}

var i;
for (i = 0; i < N; i++) {
 f32arr[i] = f32arr[i] * f32arr[i];
}

var i;
for (i = 0; i < N; i++) {
 f64arr[i] = f64arr[i] * f64arr[i];
}

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 2: published by Dmitry Podgorniy on 7th February 2013
• Revision 3: published on 7th February 2013

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