<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>function recursiveDeepCopy(obj) { return Object.keys(obj).reduce((v, d) => Object.assign(v, { [d]: (obj[d].constructor === Object) ? recursiveDeepCopy(obj[d]) : obj[d] }), {});}function recursiveDeepCopy2(obj) { return Object.keys(obj).reduce((v, d) => Object.assign(v, { [d]: obj[d] ? Object.assign(v, { [d]: obj[d].constructor === Object ? deepClone(obj[d]) : obj[d] }) : v }), {});}function deepClone(object) { let result; let i; let l; if (typeof object !== 'object') { return object; } if (!object) { return object; } if (object.constructor === Array) { result = []; l = object.length; for (i = 0; i < l; i++) { result[i] = deepClone(object[i]); } return result; } result = {}; for (i in object) { result[i] = deepClone(object[i]); } return result;}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 } } } }]}]var dimensionsCopy = recursiveDeepCopy(dimensions);var dimensionsCopy = jsonDeepCopy(dimensions);var dimensionsCopy = _.cloneDeep(dimensions);var dimensionsCopy = deepClone(dimensions);var dimensionsCopy = recursiveDeepCopy2(dimensions);--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| Recursive Deep Copy | |
| JSON Deep Copy | |
| lodash clone | |
| deepclone | |
| Recursive Deep Copy 2 |
| Test name | Executions per second |
|---|---|
| Recursive Deep Copy | 1078151.9 Ops/sec |
| JSON Deep Copy | 90982.4 Ops/sec |
| lodash clone | 52656.4 Ops/sec |
| deepclone | 83826.0 Ops/sec |
| Recursive Deep Copy 2 | 80005.5 Ops/sec |
I'll provide the answer based on my understanding of the provided text.
It appears that we have three different methods for recursively copying objects or arrays:
recursiveDeepCopy(dimensions): This function is not defined in the provided text, but its name suggests it's a custom implementation for recursive deep copying.jsonDeepCopy(dimensions): This function is also not defined, but it seems to be another custom implementation for JSON-specific deep copying..cloneDeep(dimensions) and deepClone(dimensions): These are built-in functions from the Lodash library (_.cloneDeep) and a separate library called deepclone (which is likely a wrapper around Lodash or another implementation).The benchmark results show that:
recursiveDeepCopy) has the highest execution rate, followed by JSON Deep Copy.deepClone function has an even lower execution rate than the Lodash clone function.These results suggest that the custom implementation (recursiveDeepCopy) is likely the fastest, followed by the Lodash implementation (_.cloneDeep). However, please note that this is just a conclusion based on limited data and may not be representative of all use cases or environments.
