Benchmark: Map: Lodash vs Array.prototype

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.core.js"></script>

Tests:

array map
const array = [{a: 1, b: 1}, {a: 2, b:2}, {a: 3, b:3}]; array.map(a => a.a)
lodash map
const array = [{a: 1, b: 1}, {a: 2, b:2}, {a: 3, b:3}]; _.map(array, a => a.a)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array map
lodash map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 YaBrowser/24.10.0.0 Safari/537.36

Browser/OS: Yandex Browser 24 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
array map	105938968.0 Ops/sec
lodash map	39080524.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON and explain what's being tested, the options compared, their pros and cons, and other considerations.

**Benchmark Definition**

The benchmark definition is a simple JavaScript code snippet that tests two different ways of mapping over an array:

1. Using the `Array.prototype.map()` method.
2. Using the `_` (Lodash) library's `map()` function.

The script preparation code includes a link to include the Lodash library in the test environment, so both versions can be executed with the same dependencies.

**Individual Test Cases**

There are two individual test cases:

1. **"array map"`**: This test case executes the JavaScript code `const array = [{a: 1, b: 1}, {a: 2, b:2}, {a: 3, b:3}];\r\narray.map(a => a.a)` using the built-in `Array.prototype.map()` method.
2. **"lodash map"`**: This test case executes the same JavaScript code, but with the Lodash library's `_` prefix: `const array = [{a: 1, b: 1}, {a: 2, b:2}, {a: 3, b:3}];\r\n_.map(array, a => a.a)`. The test assumes that the Lodash library has already been included in the test environment.

**Options Compared**

The two options being compared are:

* **Built-in `Array.prototype.map()` method**: This is a native JavaScript function that maps over an array and returns a new array with transformed elements.
* **Lodash's `_map()` function**: This is a utility function from the Lodash library that performs the same mapping operation as the built-in `Array.prototype.map()` method.

**Pros and Cons**

Here are some pros and cons of each option:

* **Built-in `Array.prototype.map()` method**:
	+ Pros:
		- Native JavaScript function, so no additional dependencies needed.
		- Faster execution, since it's a native function.
		- More intuitive syntax for developers familiar with the built-in `map()` function.
	+ Cons:
		- May not provide the same level of functionality or options as Lodash's `_map()` function.
* **Lodash's `_map()` function**:
	+ Pros:
		- Provides more advanced features, such as support for asynchronous mapping and partial functions.
		- Can be more convenient to use in certain situations, especially when working with complex data structures.
	+ Cons:
		- Requires additional dependencies (the Lodash library).
		- May introduce performance overhead due to the extra dependency.

**Other Considerations**

Some other considerations to keep in mind:

* **ES6 support**: The `Array.prototype.map()` method is a standard part of the ECMAScript 2015 (ES6) specification, so it's widely supported across modern browsers and Node.js environments. Lodash's `_map()` function may not be as widely supported.
* **Performance overhead**: While Lodash's `_map()` function can provide more advanced features, it also introduces additional dependencies and potentially slower execution due to the overhead of loading the library.

**Alternatives**

If you're interested in exploring alternative options for mapping over arrays, here are a few alternatives:

* **Other libraries**: There are other libraries available that provide similar functionality to Lodash's `_map()` function, such as `underscore.js` or `ramda`.
* **Custom implementation**: You can also implement your own mapping function using JavaScript's native functions (e.g., `forEach()`, `reduce()`) and some creative use of closures and callback functions.

Related benchmarks:

Map: Lodash vs Array.prototype (version: 0)

Comparing performance of: array map vs lodash map

Created: 4 years ago by: Guest

Jump to the latest result

array map

lodash map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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