Benchmark: array.map vs _.map

HTML Preparation code:

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

Script Preparation code:

var array = ['a', 'b', 'c']

Tests:

Native map
array.map((value, index) => { console.log(value) })
_.map
_.map(array, (value, index) => { console.log(value) })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native map
_.map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36

Browser/OS: Chrome 91 on Linux

View result in a separate tab

Test name	Executions per second
Native map	40916.3 Ops/sec
_.map	45103.6 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark compares the performance of two approaches to iterate over an array: using JavaScript's native `map()` function versus using the popular utility library Lodash's `_map()` function.

**Options Compared**

Two options are compared:

1. **Native `map()`**: This is a built-in JavaScript function that applies a transformation to each element in an array.
2. **Lodash's `_map()`**: This is a part of the Lodash library, which provides a functional programming style for working with arrays.

**Pros and Cons**

* **Native `map()`**:
	+ Pros: It's built-in, so it's likely to be implemented efficiently by the JavaScript engine.
	+ Cons: It may have slower performance due to overhead from calling a built-in function.
* **Lodash's `_map()`**:
	+ Pros: It can provide better performance because it's implemented in C++ and optimized for speed.
	+ Cons: It requires including an external library, which may add overhead.

**Library - Lodash**

Lodash is a popular utility library that provides a wide range of functions for working with arrays, objects, and more. The `_map()` function is one of the most commonly used functions in Lodash, allowing you to transform each element in an array.

**Special JS Feature/Syntax**

The benchmark uses ES6 syntax, specifically arrow functions (`=>`) and template literals (`<script src='https://...'`). This is a relatively modern JavaScript feature that was introduced in ECMAScript 2015 (ES6).

**Other Alternatives**

If you're interested in testing other approaches to iterating over arrays, some alternatives could include:

* Using a custom loop with `forEach()` or `for` loops
* Using a different library like Moment.js for array transformations
* Testing using WebAssembly or other low-level optimizations

However, these alternatives might not be as relevant to this specific benchmark, which is focused on comparing native JavaScript's `map()` function versus Lodash's `_map()` function.

Overall, this benchmark provides a simple and practical way to compare the performance of two different approaches to iterating over arrays in JavaScript.

Related benchmarks:

array.map vs _.map (version: 0)

Comparing performance of: Native map vs _.map

Created: 3 years ago by: Guest

Jump to the latest result

Native map

_.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):