array-mutable-vs-inmutable

JavaScript performance comparison

Test case created by liyuanqiu

Preparation code 


      
      <script>

        Benchmark.prototype.setup = function() {

          
  const n = 10000;
  const defaultValue = 3;
  var arr = Array(n).fill(defaultValue);

        
  };
          



        Benchmark.prototype.teardown = function() {

          
  arr = Array(n).fill(defaultValue);

        
  };

      
</script>

Test runner

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Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
mutable 
for (let i = 0; i < n; i += 1) {
  arr[i] = arr[i] ** 2;
}
 pending…
immutable 
const nextArr = Array(n);
for (let i = 0; i < n; i += 1) {
  nextArr[i] = arr[i] ** 2;
}
 pending…
immutable-functional 
const nextArr = arr.map(item => item ** 2);
 pending…

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