function calls: direct vs apply vs call vs bind

JavaScript performance comparison

Revision 10 of this test case created

Preparation code

 
<script>
Benchmark.prototype.setup = function() {
    var f = function(){
      return this;
    };
   
    var that = {
      f: f
    };
   
    var bound = f.bind(that);
   
    var slice = Array.prototype.slice;
    Function.prototype.bind2 = function(_this) {
      var _self = this;
      var args = slice.call(arguments, 1);
      if (args.length === 0) {
        return function() {
          if (arguments.length === 0)
            return _self.call(_this);
          else if (arguments.length > 0)
            return _self.apply(_this, args);      
        }
      }
   
      return function() {
        if (arguments.length === 0)
           return _self.apply(_this, args);
   
        var a2 = args.contact(slice.call(arguments));
        return _self.apply(_this, a2);
      }
    }
   
    var bound2 = f.bind2(that);
   
    function f1() {
    }
   
    f1.prototype.test = function() {
    }
   
    function f2() {
        this.o = new f1();
    }
   
    f2.prototype.test = function() {
        this.o.test();
    }
   
    function f3() {
        this.o = new f2();
    }
   
    f3.prototype.test = function() {
        this.o.test();
    }
   
    var o1 = new f1();
    var o2 = new f2();
    var o3 = new f3();
   
    var bound3 = o1.test.bind(o1).bind(o2).bind(o3);
   
    var obj3 = new f3();
   
    var name = 'f';
};
</script>

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Testing in unknown unknown
Test Ops/sec
direct
that.f();
pending…
apply
f.apply(that);
pending…
call
f.call(that);
pending…
bind
bound();
pending…
bind2
bound2();
pending…
by string
that['f']();
pending…
by string (indirect)
that[name]();
pending…
direct (local)
f();
pending…
bound3
bound3();
pending…
direct (long chain)
obj3.test();
pending…

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