Benchmark: native foreach vs lodash _.forEach

HTML Preparation code:

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>

Script Preparation code:

var users = [
  { 'user': 'joey',  'age': 32 },
  { 'user': 'ross',    'age': 41 },
  { 'user': 'chandler', 'age': 39 }
]

Tests:

array foreach
// Native users.forEach((user)=>{const x = user.user});
_.forEach
_.forEach(users,(user)=>{ const x = user.user; })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array foreach
_.forEach

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided benchmark compares two approaches for iterating over an array: the native `forEach` method and the `_` function from the Lodash library, which is used to iterate over arrays. Specifically, it tests how these methods perform when using the ES6 spread operator (`...`) in the iteration context.

**Options Compared**

Two options are being compared:

1. **Native `forEach`**: This is a built-in method in JavaScript that allows iterating over an array by executing a provided function for each element.
2. **Lodash `_forEach`**: This is a utility function from the Lodash library that provides an alternative way to iterate over arrays, often used when working with functional programming principles.

**Pros and Cons**

### Native `forEach`

Pros:

* Built-in method, no additional dependencies required
* Typically faster than custom implementations
* Easy to understand and use

Cons:

* Limited control over iteration context (e.g., spread operator)
* May not be as performant as custom optimized solutions

### Lodash `_forEach`

Pros:

* Provides more control over iteration context, including the ability to use the spread operator
* Often used in functional programming contexts, making it a good choice for developers familiar with these principles
* Part of the popular Lodash library, which is widely used and well-maintained

Cons:

* Requires an additional dependency (Lodash)
* May be slower than native `forEach` due to the overhead of the `_forEach` function

**Spread Operator Considerations**

The ES6 spread operator (`...`) allows creating a new array from an existing one by spreading its elements. In the context of this benchmark, it is used within the iteration context to test how each method handles this operation.

**Library Usage (Lodash)**

In this benchmark, Lodash is used as a library to provide an alternative iteration method (`_.forEach`). The `_` function is not a built-in JavaScript method, but rather a utility function from Lodash. By using Lodash, developers can tap into its extensive set of functional programming utilities.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax used in this benchmark that would require additional explanation. Both native `forEach` and Lodash `_forEach` methods use standard JavaScript syntax.

**Other Alternatives**

In addition to the two methods being compared, other alternatives for iterating over arrays include:

* For...of loop: This is a newer iteration method introduced in ECMAScript 2017 that allows iterating over arrays using a simple `for...of` loop.
* Array.prototype.map(): While not directly comparable to `forEach`, this method can be used to create new arrays by applying a transformation function to each element.

In summary, the MeasureThat.net benchmark provides a straightforward comparison of two iteration methods: native `forEach` and Lodash `_forEach`. By testing how these methods handle the ES6 spread operator in their context, developers can gain insights into performance differences between these approaches.

Related benchmarks:

native foreach vs lodash _.forEach (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: array foreach vs _.forEach

Created: 5 years ago by: Guest

Jump to the latest result

array foreach

_.forEach

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):