Benchmark: lodash test 213124

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var MyObject = {
  description: 'a',
  myNumber: 123456789,
  myBoolean: true,
};

var myCopy = null;

Tests:

cloneDeep
myCopy = _.cloneDeep(MyObject);
spread
myCopy = {...MyObject}; var a = 5 for (var j = 0; j < 1000; j++) { a = a + j; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
cloneDeep
spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

I'd be happy to help explain the JavaScript microbenchmark provided by MeasureThat.net.

**Benchmark Definition**

The benchmark definition is represented by two JSON objects: one for the overall benchmark and one for individual test cases.

1. **Overall Benchmark**: The overall benchmark definition includes:
	* `Name`: A unique name for the benchmark, which in this case is "lodash test 213124".
	* `Description`: An optional description of the benchmark, which is null in this case.
	* `Script Preparation Code`: A JavaScript code snippet that sets up the environment for the benchmark. In this case, it creates a JavaScript object called `MyObject` with some properties, and then assigns it to a variable called `myCopy`, which is initially set to null.
	* `Html Preparation Code`: A HTML code snippet that includes the URL of the Lodash library, version 4.17.5, which will be used for the benchmark.
2. **Individual Test Cases**: The individual test cases are represented by an array of objects, each containing:
	* `Benchmark Definition`: A JavaScript code snippet that defines a specific benchmark. In this case, there are two test cases: "cloneDeep" and "spread".
	* `Test Name`: A unique name for the test case.

**Options Compared**

In this benchmark, the options compared are:

1. **`_.cloneDeep(MyObject)`**: This is the first test case, which clones the entire `MyObject` object using Lodash's `cloneDeep` function.
2. **`{...MyObject}`**: This is the second test case, which creates a shallow copy of the `MyObject` object by spreading its properties into an object literal.

**Pros and Cons**

The choice between these two approaches depends on the specific use case:

1. **`.cloneDeep(MyObject)`**:
	* Pros:
		+ Creates a deep copy of the entire object, including all nested objects and arrays.
		+ Can be useful when you need to preserve the original object's structure and content.
	* Cons:
		+ Can be slower than shallow copying because it needs to recursively clone all properties.
2. **`{...MyObject}`**:
	* Pros:
		+ Creates a shallow copy of the object, which can be faster than deep cloning.
		+ Only copies the top-level properties and does not create new objects for nested ones.
	* Cons:
		+ Does not preserve the original object's structure or content if it contains arrays or other complex data structures.

**Library and Purpose**

In this benchmark, Lodash is used as a library to provide the `cloneDeep` function. The purpose of Lodash is to provide a collection of utility functions for functional programming in JavaScript.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in this benchmark that would require any specific knowledge to understand.

**Alternatives**

If you need to create copies of objects in JavaScript, there are other alternatives:

1. **`Object.assign()`**: Creates a shallow copy of an object by assigning its properties to a new object.
2. **`Array.prototype.slice()`**: Creates a shallow copy of an array by returning a new array with the same elements.
3. **`JSON.parse(JSON.stringify(obj))`**: Creates a deep copy of an object by serializing it as JSON and then parsing the resulting string back into an object.

These alternatives can be used in place of `_.cloneDeep(MyObject)` or `{...MyObject}` depending on your specific use case.

Related benchmarks:

lodash test 213124 (version: 0)

Comparing performance of: cloneDeep vs spread

Created: 3 years ago by: Guest

Jump to the latest result

cloneDeep

spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):