While vs For Queue vs Reduce

JavaScript performance comparison

Revision 30 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var items = [],
        total = 0,
        i = 0,
        j = 0;
    for (; i < 100000; i++) {
      items[i] = Math.ceil(Math.random() * 10);
    }
};
</script>

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Testing in unknown unknown
Test Ops/sec
For
for (; j < items.length; j++) {
  total += items[j];
}
pending…
While
while (items.length) {
  total += items.shift();
}
pending…
Do
do {
  total += items.shift();
} while (items.length);
pending…
Reduce
total = items.reduce(function(i, c) {
  return c + i;
}, 0)
pending…
ForEach
items.forEach(function(i) {
  total += i
})
pending…
While (no mutation)
while (j < items.length) {
  total += items[j];
  j++;
}
pending…
For (with mutation!)
for (; j < items.length; j++) {
  total += items.shift();
}
pending…
For (backward)
for (j = items.length; j >= 0; j--) {
  total += items[j];
}
pending…
ForIn
for (i in items) {
  total += items[i]
}
pending…
saveLenRev
var l = items.length;
while (l--) {
    total += items[l];
}
pending…

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