Removing duplicates

JavaScript performance comparison

Test case created by Menighin

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  const values = [9,6,0,1,1,8,1,0,1,6,4,0,0,8,3,6,4,2,1,6,5,8,0,6,8,1,2,9,2,2,3,5,0,7,8,6,2,4,0,4,8,5,6,0,0,6,9,3,9,0,9,8,7,0,5,3,0,6,3,9,8,0,3,0,0,5,1,6,6,8,3,5,2,1,5,5,0,5,9,2,1,3,1,3,5,2,9,1,8,4,2,7,8,2,1,5,5,1,0,6,5,7,4,4,6,1,3,2,3,4,5,7,3,5,4,3,9,1,4,1,3,3,3,0,4,8,2,2,3,6,9,7,2,1,7,7,2,9,5,6,4,1,8,1,7,0,0,5,4,3,9,4,1,1,5,7,4,4,2,9,1,6,5,7,7,2,2,6,7,0,1,2,3,8,7,7,9,7,1,1,6,4,5,7,9,7,5,6,5,2,8,4,2,1,5,7,2,4,7,1,7,5,3,9,4,1,2,5,8,3,9,4,2,1,6,1,8,3,6,1,9,4,1,3,1,0,6,8,6,1,8,7,4,0,6,0,2,7,0,2,7,6,3,8,0,3,8,4,4,2,6,8,3,2,0,9,0,1,7,1,3,2,7,8,0,5,7,7,8,2,0,1,0,0,1,8,3,5,2,6,0,3,8,1,2,5,5,1,2,0,0,4,1,1,9,7,6,5,2,7,6,7,7,8,5,3,1,0,5,8,4,9,2,7,1,7,2,8,8,8,2,2,8,7,4,2,9,3,5,1,2,4,7,1,3,4,9,1,6,9,1,4,0,6,6,1,6,0,6,8,5,0,5,0,6,1,9,2,4,3,5,6,7,8,7,3,9,7,1,4,1,9,5,4,0,0,7,0,7,8,7,6,6,8,5,2,1,2,6,6,1,7,3,2,5,1,5,2,1,9,2,1,7,2,4,0,9,6,1,9,4,0,1,1,8,4,5,7,7,2,2,8,4,5,9,7,2,4,5,2,9,7,1,2,5,1,5,0,6,5,3,6,0,9,3,1,4,2,3,5,6,2,0,5,8,3,5,3,7,9,5,5,5,7,0,9,0,7,8,6,5,9,6,2,2,3,0,4,0,1,0,1,2,8,1,5,0,5,0,2,7,0,9,9,8,1,5,3,9,1,8,8,6,9,8,2,1,8,4,8,3,6,0,7,4,3,6,7,3,4,2,6,7,8,8,9,5,2,6,2,8,9,7,6,3,6,5,8,4,8,0,8,6,7,3,2,8,4,0,6,3,7,4,1,5,5,5,2,7,6,6,4,6,9,6,2,1,3,3,5,6,3,7,4,9,5,3,5,6,1,4,7,6,9,3,5,7,6,8,8,4,7,3,4,1,3,3,3,7,2,4,1,2,7,2,5,6,3,4,1,8,3,6,5,5,5,4,6,0,7,9,3,4,2,2,4,0,1,6,0,5,5,6,8,2,1,8,8,0,5,9,4,7,5,5,4,1,0,1,1,1,1,1,2,4,0,5,6,4,4,0,2,6,1,4,5,0,6,6,6,7,0,3,3,7,4,7,5,3,9,0,0,3,8,6,0,0,3,6,9,5,0,9,2,1,2,2,6,6,2,5,5,9,0,4,3,8,6,3,1,3,2,8,1,9,8,2,4,8,3,1,1,1,7,0,8,2,5,5,5,4,9,8,4,6,6,5,3,5,3,4,0,0,1,9,8,7,9,8,8,0,8,3,7,1,3,9,9,1,5,8,9,6,2,6,6,6,4,8,3,3,3,2,2,6,6,1,8,5,8,8,7,7,6,5,2,4,9,3,1,1,6,0,3,6,3,2,6,3,5,8,7,4,7,2,5,5,6,0,6,3,3,5,0,4,6,2,0,1,8,8,7,9,3,2,6,6,1,4,0,7,5,8,1,2,6,2,8,9,8,0,9,6,6,6,0,3,0,3,2,2,4,7,5,4,6,1,2,4,6,1,8,2,4,7,1,6,3,1,9,3,1,9,6,3,2,5,4,6,2,1,0,7,1,6,4,7,5,4,9,3,5,7,3,0,4,3,9,1,5,6,1,2,1,3,5,0,7,0,9,2,3,4,4,0,9,3,8,3,0,5,5,3,8,6,1,2,9,4,7,7,5,8,7,1,6,3,9,4,1,1,0,4,6,6,4,6,6,4,5,8,7,9,6,8,7,5,2,3,0,8,7,0,7,2,4,1,1,9,7,1,6,8,5,1,6,6,3,4,5,0,7,3,5,5,5,0,0,4,4,6,4,6,4,2,7,1,0,7,7,1,0,1,1,1,1,1,2,4,0,5,6,4,4,0,2,6,1,4,5,0,6,6,6,7,0,3,3,7,4,7,5,3,9,0,0,3,8,6,0,0,3,6,9,5,0,9,2,1,2,2,6,6,2,5,5,9,0,4,3,8,6,3,1,3,2,8,1,9,8,2,4,8,3,1,1,1,7,0,8,2,5,5,5,4,9,8,4,6,6,5,3,5,3,4,0,0,1,9,8,7,9,8,8,0,8,3,7,1,3,9,9,1,5,8,9,6,2,6,6,6,4,8,3,3,3,2,2,6,6,1,8,5,8,8,7,7,6,5,2,4,9,3,1,1,6,0,3,6,3,2,6,3,5,8,7,4,7,2,5,5,6,0,6,3,3,5,0,4,6,2,0,1,8,8,7,9,3,2,6,6,1,4,0,7,5,8,1,2,6,2,8,9,8,0,9,6,6,6,0,3,0,3,2,2,4,7,5,4,6,1,2,4,6,1,8,2,4,7,1,6,3,1,9,3,1,9,6,3,2,5,4,6,2,1,0,7,1,6,4,7,5,4,9,3,5,7,3,0,4,3,9,1,5,6,1,2,1,3,5,0,7,0,9,2,3,4,4,0,9,3,8,3,0,5,5,3,8,6,1,2,9,4,7,7,5,8,7,1,6,3,9,4,1,1,0,4,6,6,4,6,6,4,5,8,7,9,6,8,7,5,2,3,0,8,7,0,7,2,4,1,1,9,7,1,6,8,5,1,6,6,3,4,5,0,7,3,5,5,5,0,0,4,4,6,4,6,4,2,7,1,0,7,7];

};
</script>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
Set
const uniqueValues = [...new Set(values)];
pending…
Reduce
const aux = {};
const uniqueValues = values.reduce((arr, v) => {
    if (aux[v]) return arr;
    aux[v] = 1;
    arr.push(v);
    return arr;
}, []);
pending…
Sorting
const uniqueValues = values.sort().reduce((arr, v, i, initial) => {
    if (initial[i - 1] == v) return arr;
    arr.push(v);
    return arr;
}, []);
pending…
Filter
const uniqueValues = values.filter((v, i) => values.indexOf(v) === i);
pending…
Reduce 2
const uniqueValues = values.reduce((arr, v) => arr.includes(v) ? arr : [...arr, v], []);
pending…
Optmized
const aux = {};
values.forEach(v => {
    if (aux[v]) return;
    aux[v] = 1;
});
const uniqueValues = Object.keys(aux);
pending…

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Revisions

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