<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>var testArray = [{ description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description. Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random Random description.Random description.Random description.Random description.Random description.Random description. description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'RaRandom description.Random description.Random description.Random description.Random description.ndom description.', testNumber: 123456789, testBoolean: true, testObject: { testString: 'testRandom description.Random description.Random description.Random description. string', testNumber: 12345 }, testArray: [{ description: 'Random description. Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.', myName: 'test name', myNumber: 123245 }], children: { description: 'Random description.', testNumber: 123456789, testBoolean1: new Date(), testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ myName: 'test name', myNumber: 123245 }], children: { description: 'Random description. Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.', description1: 'Random description.', testNumber: 123456789, testBoolean1: true, testObject: { testString: 'test string', testNumber: 12345 }, testArray: [{ description: 'Random description. Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.Random description.', testBoolean1: new Date(), myName: 'test name', myNumber: 123245, testBoolean: new Date() }] } } } } } } } } } } } } } } }}];var testCopy = null;var deepClone = function(obj) { var out; if (Array.isArray(obj)) { out = []; for (var index = 0; index < obj.length; ++index) { let subArray = obj[index]; out.push((subArray === null) ? subArray : (subArray instanceof Date) ? new Date(subArray.valueOf()) : (typeof subArray === 'object') ? deepClone(subArray) : subArray); } } else { out = {}; for (var key in obj) { var subObject = obj[key]; out[key] = subObject === null ? subObject : subObject instanceof Date ? new Date(subObject.valueOf()) : (typeof subObject === 'object') ? deepClone(subObject) : subObject; } } return out;};testCopy = _.cloneDeep(testArray);testCopy = JSON.parse(JSON.stringify(testArray));testCopy = deepClone(testArray);testCopy = structuredClone(testArray);--enable-precise-memory-info flag.
| Test case name | Result |
|---|---|
| Lodash cloneDeep | |
| Native JSON parse | |
| Recursive deep clone | |
| structuredClone |
| Test name | Executions per second |
|---|---|
| Lodash cloneDeep | 45000.7 Ops/sec |
| Native JSON parse | 57330.4 Ops/sec |
| Recursive deep clone | 46832.2 Ops/sec |
| structuredClone | 49831.0 Ops/sec |
It appears that we have a JavaScript code snippet with two main parts:
Benchmarking configuration: The first part is an array of objects, where each object represents a benchmark test case. Each test case has the following properties:
Benchmark Definition: a string that defines the test case.Test Name: a string that provides a human-readable name for the test case.Code snippet: The second part is a JavaScript code snippet, which includes:
var deepClone = function(obj) {...}{ "Individual test cases": [...], "Latest benchmark result": [...]" }Questions:
deepClone function?Assumptions:
Individual test cases array contains four test cases, each with a different approach to cloning an object.Latest benchmark result array contains four benchmark results for each of the test cases.Please feel free to provide more context or clarify any assumptions I may have made.
