function calls: direct vs apply vs call vs bind

JavaScript performance comparison

Revision 8 of this test case created by

Preparation code


      
      <script>
Benchmark.prototype.setup = function() {
  var f = function() {
      return this;
      };
  
  var that = {
    f: f
  };
  
  var bound = f.bind(that);
  
  var wrappedCall = function() {
      f.call(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);
  
  var name = 'f';

};
</script>

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Testing in CCBot 2.0.0 / Other 0.0.0
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…
Wrapped Call
wrappedCall()
pending…
call by string
that['f'].call(that);
pending…

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Revisions

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