merge-array implementations

JavaScript performance comparison

Revision 18 of this test case created by Gerardo Lima

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var arr1 = Array.from(Array(5000), (x,i) => i + 1)
  var arr2 = Array.from(Array(5000), (x,i) => i - 1)
  
  var arr1Length = arr1.length; 
  var arr2Length = arr2.length; 

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
concat
arr1 = arr1.concat(arr2)
pending…
push (naive 2)
// Pre allocate size
arr1.length = arr1Length + arr2Length

// Add arr2 items to arr1
for(var i = 0; i < arr2Length; i++){
  arr1[arr1Length + i] = arr2[i]
}
pending…
>> concat by push into empty
const target = [];
target.push(...arr1);
target.push(...arr2);
pending…
push
Array.prototype.push.apply(arr1, arr2)
pending…

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