constructor argument or member access

JavaScript performance comparison

Test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var Thing = function () {};
    Thing.prototype.arg = 1;
   
    ui.benchmarks[0].setup = function () {
      Thing = function ( arg ) { if ( arg !== undefined ) { this.arg = arg } };
      Thing.prototype.arg = 1;
    };
   
};
</script>

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Testing in unknown unknown
Test Ops/sec
Pass argument
var a = new Thing( 2 );
 
pending…
Access member
var b = new Thing();
b.arg = 2;
 
pending…

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