Manual Constructor Call vs new

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    function Class(a, b) {
      this.a = a;
      this.b = b;
    }
    Class.prototype.toString = function() {
      return this.a + ' ' + this.b;
    };
};
</script>

Test runner

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Testing in unknown unknown
Test Ops/sec
new
var instance = new Class(1337, 420);
pending…
Manual Constructor Call
var instance = {};
Class.call(instance, 1337, 420);
instance.__proto__ = Class.prototype;
pending…

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