While vs For Queue vs Reduce

JavaScript performance comparison

Revision 6 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…

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