String.fromCharCode Test

JavaScript performance comparison

Revision 13 of this test case created by Goktug

Preparation code

<script>
  var chars = [123, 34, 122, 34, 58, 34, 115, 101, 99, 111, 110, 100, 84, 97, 98, 34, 44, 34, 97, 34, 58, 34, 110, 111, 110, 101, 34, 44, 34, 98, 34, 58, 117, 110, 100, 101, 102, 105, 110, 101, 100, 44, 34, 101, 34, 58, 117, 110, 100, 101, 102, 105, 110, 101, 100, 125];
  // Generate 1M chars
  chars = [];
  for (var i=0; i < 1<<20; i++ ) chars.push(i & 0xFF)
</script>
    

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Using a loop
var s = "";
for (var i = 0, l = chars.length; i < l; i++)
  s += String.fromCharCode(chars[i]);
pending…
Hybrid
var s = "", i = 0, l = chars.length;
while (i < l) {
  var end = Math.min(i + 10000, l);
  s += String.fromCharCode.apply(null, chars.slice(i, end));
  i = end;
}
return s;
pending…

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