Run results for: Object Deep Copy Test3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Browser: Chrome 68

Operating system: Mac OS X 10.12.6

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Recursive Deep Copy	255375.8 Ops/sec
JSON Deep Copy	41787.6 Ops/sec
lodash clone	25261.8 Ops/sec
cloneDeep	28255.5 Ops/sec
cloneDeep2	25869.6 Ops/sec
cloneDeep3	10142.3 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.js"></script> <script src="https://unpkg.com/babel-standalone@6/babel.min.js"></script>

Script Preparation code:

function recursiveDeepCopy(obj) {
  return Object.keys(obj).reduce((v, d) => Object.assign(v, {
    [d]: (obj[d].constructor === Object) ? recursiveDeepCopy(obj[d]) : obj[d]
  }), {});
}

function cloneDeep(objSource) {
	if (typeof objSource !== 'object' || objSource === null) {
		return objSource;
	}
	return cloneDeepRecursive(objSource);
	
};

function cloneDeepRecursive(objSource) {
  let objTarget = Array.isArray(objSource) ? [] : {};

	let keys = Object.keys(objSource);
	keys.forEach(key => {
		let value = objSource[key];
		if (value === null) {
			objTarget[key] = null;
		} else if (typeof value === 'object') {
			objTarget[key] = cloneDeepRecursive(value);
		} else {
			objTarget[key] = value;
		}
	});
	return objTarget;
}

function cloneDeep2(objSource) {
	if (typeof objSource !== 'object' || objSource === null) {
		return objSource;
	}

	let keys = Object.keys(objSource);
	return keys.reduce((objTarget, key) => {
		let value = objSource[key];
		if (value === null || typeof value !== 'object') {
			objTarget[key] = value;
		} else {
			objTarget[key] = cloneDeep2(value);
		}
		return objTarget;
	}, Array.isArray(objSource) ? [] : {});
};

function cloneDeep3(objSource) {
	if (objSource === null || typeof objSource !== 'object') {
		return objSource;
	}
	return cloneDeep2Recursive(objSource);
};

function cloneDeep2Recursive(objSource) {
	return Object.keys(objSource).reduce((objTarget, key) => {
		return Object.assign(objTarget, {
			[key]: (objSource[key] === null || typeof objSource[key] !== 'object') ? objSource[key] : cloneDeep2Recursive(objSource[key])
		});
	}, Array.isArray(objSource) ? [] : {});
};

function jsonDeepCopy(o) {
  return JSON.parse(JSON.stringify(o));
}

var dimensions = [{
  "dimensions": [{
    "runtime": {
      "common": {
        "client": null,
        "server": null
      }
    }
  }, {
    "device": {
      "android": null,
      "blackberry": null,
      "iemobile": null,
      "iphone": null,
      "ipad": null,
      "kindle": null,
      "opera-mini": null,
      "palm": null
    }
  }, {
    "environment": {
      "development": {
        "dev": null,
        "test": null
      },
      "production": {
        "stage": null,
        "prod": null
      }
    }
  }, {
    "lang": {
      "ar": {
        "ar-JO": null,
        "ar-MA": null,
        "ar-SA": null,
        "ar-EG": null
      },
      "bn": {
        "bn-IN": null
      },
      "ca": {
        "ca-ES": null
      },
      "cs": {
        "cs-CZ": null
      },
      "da": {
        "da-DK": null
      },
      "de": {
        "de-AT": null,
        "de-DE": null
      },
      "el": {
        "el-GR": null
      },
      "en": {
        "en-AU": null,
        "en-BG": null,
        "en-CA": null,
        "en-GB": null,
        "en-GY": null,
        "en-HK": null,
        "en-IE": null,
        "en-IN": null,
        "en-MY": null,
        "en-NZ": null,
        "en-PH": null,
        "en-SG": null,
        "en-US": null,
        "en-ZA": null
      },
      "es": {
        "es-AR": null,
        "es-BO": null,
        "es-CL": null,
        "es-CO": null,
        "es-EC": null,
        "es-ES": null,
        "es-MX": null,
        "es-PE": null,
        "es-PY": null,
        "es-US": null,
        "es-UY": null,
        "es-VE": null
      },
      "fi": {
        "fi-FI": null
      },
      "fr": {
        "fr-BE": null,
        "fr-CA": null,
        "fr-FR": null,
        "fr-GF": null
      },
      "hi": {
        "hi-IN": null
      },
      "hu": {
        "hu-HU": null
      },
      "id": {
        "id-ID": null
      },
      "it": {
        "it-IT": null
      },
      "ja": {
        "ja-JP": null
      },
      "kn": {
        "kn-IN": null
      },
      "ko": {
        "ko-KR": null
      },
      "ml": {
        "ml-IN": null
      },
      "mr": {
        "mr-IN": null
      },
      "ms": {
        "ms-MY": null
      },
      "nb": {
        "nb-NO": null
      },
      "nl": {
        "nl-BE": null,
        "nl-NL": null,
        "nl-SR": null
      },
      "pl": {
        "pl-PL": null
      },
      "pt": {
        "pt-BR": null
      },
      "ro": {
        "ro-RO": null
      },
      "ru": {
        "ru-RU": null
      },
      "sv": {
        "sv-SE": null
      },
      "ta": {
        "ta-IN": null
      },
      "te": {
        "te-IN": null
      },
      "th": {
        "th-TH": null
      },
      "tr": {
        "tr-TR": null
      },
      "vi": {
        "vi-VN": null
      },
      "zh": {
        "zh-Hans": {
          "zh-Hans-CN": null
        },
        "zh-Hant": {
          "zh-Hant-HK": null,
          "zh-Hant-TW": null
        }
      }
    }
  }]
}]

Tests:

Recursive Deep Copy
var dimensionsCopy = recursiveDeepCopy(dimensions);
JSON Deep Copy
var dimensionsCopy = jsonDeepCopy(dimensions);
lodash clone
var dimensionsCopy = _.cloneDeep(dimensions);
cloneDeep
var dimensionsCopy = cloneDeep(dimensions);
cloneDeep2
var dimensionsCopy = cloneDeep2(dimensions);
cloneDeep3
var dimensionsCopy = cloneDeep3(dimensions);

Run results for: Object Deep Copy Test3

Produce a deep copy of a Javascript object where nested objects are not simply references to the originals.

Recursive Deep Copy

JSON Deep Copy

lodash clone

cloneDeep

cloneDeep2

cloneDeep3