bind vs emulate (v29)

Revision 29 of this benchmark created on

Preparation HTML

<div></div>
<script>
var emulatebind = function (f, context) {
  var curriedArgs = Array.prototype.slice.call(arguments, 2);
  if (curriedArgs.length) {
    return function () {
      var allArgs = curriedArgs.slice(0);
      for (var i = 0, n = arguments.length; i < n; ++i) {
        allArgs.push(arguments[i]);
      }
      return f.apply(context, allArgs);
    };
  } else {
    return createProxy(f, context);
  }
};

var emulatebind_2 = function (f, context) {
  if (arguments.length > 2) {
    var curriedArgs = Array.apply(null, arguments).slice(2);
    return function () {
      var allArgs = curriedArgs.slice(0);
      for (var i = 0, n = arguments.length; i < n; ++i) {
        allArgs.push(arguments[i]);
      }
      return f.apply(context, allArgs);
    };
  } else {
    return createProxy(f, context);
  }
};

var emulatebind_3 = function (f, context) {
  if (arguments.length > 2) {
    var curriedArgs = Array.apply(null, arguments).slice(2);
    return function () {
      var numArgs = arguments.length;
      if (numArgs == 0) return f.apply(context, curriedArgs);
      return f.apply(context, curriedArgs.concat(
        (numArgs == 1) ? [arguments[0]] : Array.apply(null, arguments)
      ));
    };
  } else {
    return createProxy(f, context);
  }
};

function createProxy(f, context) {
  return function () {
    return f.apply(context, arguments);
  }
}

var i = { i: 0 };

var f = function () {
  return this.i++;
};

function bind(fn, ctx) {
if(!fn.apply){
return fn.bind(ctx);
}
  return function() {
    return fn.apply(ctx, arguments);
  };
}
</script>

Setup

var binded = f.bind(i);
    var emulated = emulatebind(f, i);
    var emulated_2 = emulatebind_2(f, i);
    var emulated_3 = emulatebind_3(f, i);
    var simple = bind(f, i);;
    var self = function() {
        return i.i++;
    }

Teardown


    i.i = 0;

Test runner

Ready to run.

Testing in
TestOps/sec
bind
if (!( binded() >= 0 ))
  throw new Error('not ok');
ready
emulate
if (!( emulated() >= 0 ))
  throw new Error('not ok');
ready
simple
if (!( simple() >= 0 ))
  throw new Error('not ok');
ready
self
if (!( self() >= 0 ))
  throw new Error('not ok');
ready
emulate_2
if (!( emulated_2() >= 0 ))
  throw new Error('not ok');
ready
emulate_3
if (!( emulated_3() >= 0 ))
  throw new Error('not ok');
ready

Revisions

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