Compare for loop vs while loop

JavaScript performance comparison

Revision 23 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var a = [];
  for (var i = 1; i <= 10000; i++) a.push(i);

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
for basic
var length = a.length;
while (length) {
  length += -1;
}
pending…
for cached 1
var length = a.length,
  i = 0;
for (; length > i;) {
  i += 1;
}
pending…
for cached 2
var length = a.length,
  i = 0;
for (; i < length;) {
  i += 1;
}
pending…
for basic reverse
for (var i = a.length; i--;) {}
pending…
for cached 1 reverse
var length = a.length;
for (; length;) {
  length -= 1;
}
pending…
for cached 2 reverse
var length = a.length;
for (; length;) {
  --length;
}
pending…
while basic
var i = 0;
while (i < a.length) {
  i++;
}
pending…
while chached
var length = a.length,
  i = 0;
while (i < length) {
  i++;
}
pending…
while reverse
var length = a.length;
while (length) {
  length -= 1;
}
pending…
for cached 3 reverse
var length = a.length;
for (; length; length--) {}
pending…
simple for
for (var i = 0, l = a.length; i < l; i++) {}
pending…
foreach
for (var e in a) {}
pending…

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