custom array forEach (v12)

Revision 12 of this benchmark created by termi on

Setup

var array=["foo","bar","baz","lorem","ipsum","lol","cat"];
  
  var func=function(){2+2};
  
  Array.prototype.forEach2=function(a){
    var l=this.length;
    for(var i=0;i<l;i++)a(this[i],i)
  }
  
  Array.prototype.map2=function(a){
  var l=this.length;
  var array=new Array(l),i=0;
  for(;i<l;i++){array[i]=a(this[i],i)}
  return array;
  }
  
  var setPrototypeOf = Object.setPrototypeOf || function(o, p){
  	o.__proto__ = p;
  	return o;
  };
  
  var TrueCustomArray = function () {
  	var array = new (Function.prototype.bind.apply(Array, [null].concat([].slice.call(arguments))));
  	setPrototypeOf(array, this.__proto__);
  	return array;
  };
  
  TrueCustomArray.prototype = Object.create(Array.prototype, { constructor: { value: TrueCustomArray } });
  TrueCustomArray.prototype.append = function(var_args) {
  	var_args = this.concat.apply([], arguments);        
  	this.push.apply(this, var_args);
  
  	return this;
  };
  TrueCustomArray.prototype.prepend = function(var_args) {
  	var_args = this.concat.apply([], arguments);
  	this.unshift.apply(this, var_args);
  
  	return this;
  };
  ["concat", "reverse", "slice", "splice", "sort", "filter", "map"].forEach(function(name) {
  	var _Array_prototype = this;
  	TrueCustomArray.prototype[name] = function() {
  		var result = _Array_prototype[name].apply(this, arguments);
  		setPrototypeOf(result, this.__proto__);
  		return result;
  	}
  }, Array.prototype);
  
  var customArray = new TrueCustomArray("foo","bar","baz","lorem","ipsum","lol","cat");

Test runner

Ready to run.

Testing in
TestOps/sec
for
(function(){
for(var i=array.length;i--;)2+2;
})()
ready
foreach
array.forEach(func)
ready
custom foreach
array.forEach2(func)
ready
map
array.map(func)
ready
custom map
array.map2(func)
ready
custom array for
(function(){
for(var i=customArray.length;i--;)2+2;
})()
ready
custom array foreach
customArray.forEach(func)
ready
custom array custom foreach
customArray.forEach2(func)
ready
custom array map
customArray.map(func)
ready
custom array custom map
customArray.map2(func)
ready

Revisions

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