deep cloning of objects (v11)

Revision 11 of this benchmark created on June 19, 2014

Description

Preparation HTML

<script src="http://code.jquery.com/jquery-1.8.0.js" type="text/javascript"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/1.3.1/lodash.min.js"></script>
<script>var lodash = _.noConflict();</script>

<script>
function deepClone1(obj) {
  return JSON.parse(JSON.stringify(obj));
}

function deepClone2(obj) {
  var i, ret, ret2;
  if (typeof obj === "object") {
    if (obj === null) return obj;
    if (Object.prototype.toString.call(obj) === "[object Array]") {
      ret = [];
      for (i = 0; i < obj.length; i++) {
        if (typeof obj[i] === "object") {
          ret2 = deepClone2(obj[i]);
        } else {
          ret2 = obj[i];
        }
        ret.push(ret2);
      }
    } else {
      ret = {};
      for (i in obj) {
        if (obj.hasOwnProperty(i)) {
          if (typeof(obj[i] === "object")) {
            ret2 = deepClone2(obj[i]);
          } else {
            ret2 = obj[i];
          }
          ret[i] = ret2;
        }
      }
    }
  } else {
    ret = obj;
  }

  return ret;
}

// comes from: http://jsperf.com/cloning-an-object/23
function deepClone3(obj) {
    var target = {};
    for (var i in obj) {
      if (typeof(obj) === 'object') {
        target[i] = deepClone3(obj[i]);
      }
      else {
        target[i] = obj[i];
      }
    }
    return target;
  }

// adapted from: http://jsperf.com/cloning-an-object/23
function deepClone4(obj) {
   return lodash.clone(obj, /*deep=*/true);
}

// adapted from: http://jsperf.com/cloning-an-object/23
function deepClone5(obj) {
   return jQuery.extend(/*deep=*/true, {}, obj);
}

// comes from: http://jsperf.com/cloning-an-object/23
function deepClone6(obj) {
   return Object.clone(obj);
}

// adapted/reduced from: http://jsperf.com/structured-clone-objects/2 and https://developer.mozilla.org/en-US/docs/DOM/The_structured_clone_algorithm
function deepClone7(oToBeCloned) {
  if (oToBeCloned === null || !(oToBeCloned instanceof Object)) { return oToBeCloned; }
  var oClone, fConstr = oToBeCloned.constructor;
  oClone = new fConstr();
  for (var sProp in oToBeCloned) { oClone[sProp] = deepClone7(oToBeCloned[sProp]); }
  return oClone;
};


// ******************

// comes from: http://jsperf.com/cloning-an-object/23
if(typeof Object.defineProperties != 'undefined') {
  Object.defineProperties(Object, {
    'extend': {
      'configurable': true,
      'enumerable': false,
      'value': function extend(what, wit) {
        var extObj, witKeys = Object.keys(wit);

        extObj = Object.keys(what).length ? Object.clone(what) : {};

        witKeys.forEach(function(key) {
          Object.defineProperty(extObj, key, Object.getOwnPropertyDescriptor(wit, key));
        });

        return extObj;
      },
      'writable': true
    },
    'clone': {
      'configurable': true,
      'enumerable': false,
      'value': function clone(obj) {
        return Object.extend({}, obj);
      },
      'writable': true
    }
  });
}
// ******************

// ensure that the deep-clone is actually accurate
function compareObjs(obj1, obj2) {
  // snapshot how `obj1` currently looks
  var orig = JSON.stringify(obj1);

  // test if `obj2` really was a clone of `obj1`
  if (orig !== JSON.stringify(obj2)) {
    throw new Error("failed test 1");
  }

  // do some mutations to `obj2` clone
  obj2[0].firstName = "3";
  // check that `obj1` wasn't affected
  if (orig !== JSON.stringify(obj1)) {
    throw new Error("failed test 2");
  }
}







// Generated by LiveScript 1.2.0
(function(){
    var __toStr = {}.toString
      , __owns = {}.hasOwnProperty
      , isArray_slowFallback = Array.isArray || function(obj) {
            return typeof obj.unshift !== 'undefined' && __toStr.call(obj) === '[object Array]';
      }
      , chickenOutCounter
      , chickenOutThreshold
      , nop = function(){}
      , innerFn = deepCloneWithBelts_inner
      //, friendPrototypesObj = []
      //, friendPrototypesArr = []
      ;

    deepCloneNo_Belt = function(obj) {
        if (typeof obj !== 'object')
            return obj;
        else
            return deepCloneNoBelt_inner(obj);
    };

    cpo = deepClone_Safe = function(obj, refRecursionSafe) {
        refRecursionSafe == null && (refRecursionSafe = 0);
        if (typeof obj !== 'object')
            return obj;

        else if (refRecursionSafe === true)
            return createReferenceRecursionAwareInner()(obj);

        else if (refRecursionSafe === 0)
            return deepCloneNoBelt_inner(obj);

        else {
            chickenOutCounter = 0;
            chickenOutThreshold = typeof refRecursionSafe === 'number' ? refRecursionSafe : 10000;
            out = innerFn(obj);

            // Was there a bail out because of suspected reference recursion?
            if (innerFn === nop) {
                innerFn = deepCloneWithBelts_inner; // reset from bail-out function
                out = createReferenceRecursionAwareInner()(obj);
            }

            return out;
        }
    };

    function deepCloneNoBelt_inner(obj) {
        // Null?
        if (obj === null)
            return null;

        var ctor = obj.constructor;

        // A pure object?
        if (ctor === Object) {
            var k, v, reto = {};
            for (k in obj)
                if (__owns.call(obj, k))
                    reto[k] = typeof (v = obj[k]) === 'object' ? deepCloneNoBelt_inner(v) : v;
            return reto;
        }
        // Array?
        if (ctor === Array || isArray_slowFallback(obj)) {
            var i, v, len = obj.length, reto = new Array(len);
            for (i = 0; i < len; ++i)
                reto[i] = typeof (v = obj[i]) === 'object' ? deepCloneNoBelt_inner(v) : v;
            return reto;
        }
        // Fast RegExp & Date checks first
        if (ctor === Date || ctor === RegExp)
            return obj;

        // Slower Date-check
        if (typeof obj.getYear !== 'undefined' && __toStr.call(obj)=== '[object Date]')
            return obj;

        // Slower RegExp-check
        if (typeof obj.exec !== 'undefined' && typeof obj.match !== 'undefined')
            return obj;

        if (__toStr.call(obj === '[object Object]')) {
            var k, v, reto = {};
            for (k in obj)
                if (__owns.call(obj, k))
                    reto[k] = typeof (v = obj[k]) === 'object' ? deepCloneNoBelt_inner(v) : v;
            return reto;
        }
        return obj;
    }

    function deepCloneWithBelts_inner(obj) {
        if (++chickenOutCounter > chickenOutThreshold) {
            innerFn = nop;
            return null;
        }
        if (obj === null)
            return null;

        var ctor = obj.constructor;

        if (ctor === Object) {
            var k, v, reto = {};
            for (k in obj)
                if (__owns.call(obj, k))
                    reto[k] = typeof (v = obj[k]) === 'object' ? innerFn(v) : v;
            return reto;
        }
        //var isAnArray = false;
        //if (ctor === Array) {
        //    isAnArray = true;
        //} else if (friendPrototypesArr.indexOf(ctor) != -1) {
        //    isAnArray = true;
        //} else if (isArray_slowFallback(obj)) {
        //    isAnArray = true;
        //    friendPrototypesArr.push(ctor);
        //}
        if (ctor === Array || isArray_slowFallback(obj)) {
            var i, v, len = obj.length, reto = new Array(len);
            for (i = 0; i < len; ++i) {
                reto[i] = typeof (v = obj[i]) === 'object' ? innerFn(v) : v;
            }
            return reto;
        }
        if (ctor === Date || ctor === RegExp) {
            return obj;
        }
        // Slower RegExp-check
        if (typeof obj.exec !== 'undefined' && typeof obj.match !== 'undefined')
            return obj;

        // Slower Date-check
        if (typeof obj.getYear !== 'undefined' && __toStr.call(obj)=== '[object Date]')
            return obj;

        //if (friendPrototypesObj.indexOf(ctor ) != -1 || __toStr.call(obj === '[object Object]')) {
        if (__toStr.call(obj === '[object Object]')) {
            //friendPrototypesObj.push(ctor);
            var k, v, reto = {};
            for (k in obj)
                if (__owns.call(obj, k))
                    reto[k] = typeof (v = obj[k]) === 'object' ? innerFn(v) : v;
            return reto;
        }
        return obj;
    }

    function createReferenceRecursionAwareInner() {
        var seen = []
          , mapArr = []
          ;

        function _cpo_inner(obj){
            var i;

            // Reference recursion?
            if ((i = seen.indexOf(obj)) !== -1)
                return mapArr[i];

            // Null?
            if (obj === null)
                return null;

            var ctor = obj.constructor
              , foundAnObj = (ctor === Object);

            // Not a pure object afawn? Check for other stuff
            if (!foundAnObj) {
                // Array?
                if (ctor === Array || isArray_slowFallback(obj)) {
                    var v, len = obj.length, reto = new Array(len);
                    mapArr.push(reto);
                    seen.push(obj);
                    for (i = 0; i < len; ++i)
                        reto[i] = typeof (v = obj[i]) === 'object' ? _cpo_inner(v) : v;
                    return reto;
                }
                // Fast RegExp & Date checks first
                if (ctor === Date || ctor === RegExp)
                    return obj;

                // Slower RegExp-check
                if (typeof obj.exec !== 'undefined' && typeof obj.match !== 'undefined')
                    return obj;

                // Slower Date-check
                if (typeof obj.getYear !== 'undefined' && __toStr.call(obj)=== '[object Date]')
                    return obj;
            }
            // Lastly and most expensively, if foundAnObj is not already true,
            // we do the hideous toString check. /ORC
            if (foundAnObj || __toStr.call(obj) === '[object Object]') {
                var k, v, reto = {};
                mapArr.push(reto);
                seen.push(obj);
                for (k in obj)
                    if (__owns.call(obj, k))
                        reto[k] = typeof (v = obj[k]) === 'object' ? _cpo_inner(v) : v;
                return reto;
            }
            return obj;
        };
        return _cpo_inner;
    }

}.call(this));




</script>

Setup

var a = [
      {id: 1, name: {first: 'Joe', last: 'Fabiano'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Joe.Fabiano@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
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      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
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      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'},
      {id: 2, name: {first: 'Fred', last: 'Wecler'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Fred.Wecler@ex.com'},
      {id: 3, name: {first: 'Steve', last: 'Wilson'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Steve.Wilson@ex.com'},
      {id: 4, name: {first: 'Maria', last: 'Fernandez'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'M.Fernandez@ex.com'},
      {id: 5, name: {first: 'Pierre', last: 'Barbault'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Pierre.Barbault@ex.com'},
      {id: 6, name: {first: 'Nancy', last: 'Moore'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Nancy.Moore@ex.com'},
      {id: 7, name: {first: 'Barbara', last: 'MacDonald'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'B.MacDonald@ex.com'},
      {id: 8, name: {first: 'Wilma', last: 'Williams'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Wilma.Williams@ex.com'},
      {id: 9, name: {first: 'Sasha', last: 'Silver'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Sasha.Silver@ex.com'},
      {id: 10, name: {first: 'Don', last: 'Pérignon'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Don.Pérignon@ex.com'},
      {id: 11, name: {first: 'Aaron', last: 'Kinley'}, children: [{first: 'Bubba', last: 'Leatherchest'}, {first: 'Tux', last: 'Sysop', toys: ['Linux', 'JS-Perf', 'Machine Guns']}], ip: '0.0.0.1', email: 'Aaron.Kinley@ex.com'}
    ];

Test runner

var b, i = 10;
while(i--)
    b = deepClone1(a);

compareObjs(a, b);
 

var b, i = 10;
while(i--)
    b = deepClone2(a);

compareObjs(a, b);
 

// comes from: http://jsperf.com/cloning-an-object/23

// NOTE: this jsperf is intentionally set up to prove that the
// deep cloning shown on that other jsperf is invalid, that's
// why this test throws an error, because the comparison fails.

var b, i = 10;
while(i--)
    b = deepClone3(a);

compareObjs(a, b);
 

// adapted from: http://jsperf.com/cloning-an-object/23

var b, i = 10;
while(i--)
    b = deepClone4(a);

compareObjs(a, b);
 

// adapted from: http://jsperf.com/cloning-an-object/23

var b, i = 10;
while(i--)
    b = deepClone5(a);

compareObjs(a, b);
 

// comes from: http://jsperf.com/cloning-an-object/23

// NOTE: this jsperf is intentionally set up to prove that the
// deep cloning shown on that other jsperf is invalid, that's
// why this test throws an error, because the comparison fails.

var b, i = 10;
while(i--)
    b = deepClone6(a);

compareObjs(a, b);

 

// adapted/reduced from: http://jsperf.com/structured-clone-objects/2 
// and https://developer.mozilla.org/en-US/docs/DOM/The_structured_clone_algorithm

var b, i = 10;
while(i--)
    b = deepClone7(a);

compareObjs(a, b);
 

// Compared to deepClone1, and others, this handles Function, 
// Date and RegExp properties/objects fine too. /ORC
// In this mode it also makes sure to not follow recursive references,
// instead returning the copy made, thereby even cloning the 
// inner-object recursion. /ORC

var b, i = 10;
while(i--)
    b = cpo(a, true);

compareObjs(a, b);
 

// Compared to deepClone1, and others, this handles Function, 
// Date and RegExp properties/objects fine too. /ORC
// In this mode it keeps track of object divings - if it gets
// above chosen threshold - it aborts and falls back to using
// the 'Recursive References Objects'-safe version and then 
// makes sure to not follow recursive references,
// instead returning the copy made, thereby even cloning the 
// inner-object recursion. /ORC

var b, i = 10;
while(i--)
    b = cpo(a, 10000);

compareObjs(a, b);
 

// Compared to deepClone1, and others, this handles Function, 
// Date and RegExp properties/objects fine too. /ORC
// In this mode it keeps track of object divings - if it gets
// above chosen threshold - it aborts and falls back to using
// the 'Recursive References Objects'-safe version and then 
// makes sure to not follow recursive references,
// instead returning the copy made, thereby even cloning the 
// inner-object recursion. /ORC

var b, i = 10;
while(i--)
    b = cpo(a, 699);

compareObjs(a, b);
 

// Compared to deepClone1, and others, this handles Function, 
// Date and RegExp properties/objects fine too. /ORC
// In this mode, no thought is given to reference recursion.
var b, i = 10;
while(i--)
    b = cpo(a);

compareObjs(a, b);
 

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

• Revision 1: published by Kyle Simpson on September 11, 2012
• Revision 2: published by Bernie on June 11, 2013
• Revision 3: published by derry on July 1, 2013
• Revision 4: published by Marcin on July 2, 2013
• Revision 5: published by Marcin on July 2, 2013
• Revision 9: published by Oscar Campbell on June 18, 2014
• Revision 10: published by Oscar Campbell on June 19, 2014
• Revision 11: published on June 19, 2014
• Revision 12: published by Oscar Campbell on June 22, 2014
• Revision 28: published by cari bisnis rumahan sampingan on February 6, 2015
• Revision 29: published by cari modal usaha on February 9, 2015
• Revision 31: published on June 8, 2015