angular.forEach vs jQuery.each

JavaScript performance comparison

Test case created by Monkey Monk

Preparation code 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.1/angular.min.js"></script>
<script>
// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
// Production steps of ECMA-262, Edition 5, 15.4.4.18
// Reference: http://es5.github.com/#x15.4.4.18
if (!Array.prototype.forEach) {

  Array.prototype.forEach = function forEach(callback, thisArg) {

    'use strict';
    var T, k;

    if (this == null) {
      throw new TypeError("this is null or not defined");
    }

    var kValue,
        // 1. Let O be the result of calling ToObject passing the |this| value as the argument.
        O = Object(this),

        // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
        // 3. Let len be ToUint32(lenValue).
        len = O.length >>> 0; // Hack to convert O.length to a UInt32

    // 4. If IsCallable(callback) is false, throw a TypeError exception.
    // See: http://es5.github.com/#x9.11
    if ({}.toString.call(callback) !== "[object Function]") {
      throw new TypeError(callback + " is not a function");
    }

    // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
    if (arguments.length >= 2) {
      T = thisArg;
    }

    // 6. Let k be 0
    k = 0;

    // 7. Repeat, while k < len
    while (k < len) {

      // a. Let Pk be ToString(k).
      //   This is implicit for LHS operands of the in operator
      // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
      //   This step can be combined with c
      // c. If kPresent is true, then
      if (k in O) {

        // i. Let kValue be the result of calling the Get internal method of O with argument Pk.
        kValue = O[k];

        // ii. Call the Call internal method of callback with T as the this value and
        // argument list containing kValue, k, and O.
        callback.call(T, kValue, k, O);
      }
      // d. Increase k by 1.
      k++;
    }
    // 8. return undefined
  };
}
</script>

Preparation code output

Test runner

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Java applet disabled.

Testing in ArchiveTeam ArchiveBot 20190617.01.0 / Windows 7 0.0.0
Test Ops/sec
angular 
var testArray = Array.apply(null, {length: 5000}).map(Function.call, Math.random);

angular.forEach(testArray, function (value, index) {
    // do something
});
 pending…
jQuery 
var testArray = Array.apply(null, {length: 5000}).map(Function.call, Math.random);

jQuery.each(testArray, function (index, value) {
    // do something
});
 pending…
Array.prototype.forEach 
var testArray = Array.apply(null, {length: 5000}).map(Function.call, Math.random);

testArray.forEach(function (index, value) {
    // do something
});
 pending…

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