Benchmark: Lodash omit Vs. es6 rest spread

HTML Preparation code:

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

Script Preparation code:

var n = 10000;
var o = {};

while (n) {
  o["entry"+ n] = true;
  n--;  
}

Tests:

Lodash Omit
_.omit(o, "entry1", "entry2", "entry3", "entry4", "entry5", "entry6", "entry7", "entry8", "entry9", "entry10");
ES6 spread
const {entry1, entry2, entry3, entry4, entry5, entry6, entry7, entry8, entry9, entry10, ...props} = o;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash Omit
ES6 spread

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 23 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark is comparing two approaches to omit certain properties from an object:

1. Using Lodash's `omit` function:
```javascript
_.omit(o, "entry1", "entry2", ...);
```
This function creates a new object that includes all the properties of `o` except those specified in the array.

2. Using ES6 spread operator (`...props`) to omit properties:
```javascript
const { entry1, entry2, ..., props } = o;
```
In this approach, the spread operator is used to extract all properties from `o` into an object called `props`, except for the ones specified in the array.

**Options Compared**

The two options being compared are:

* Lodash's `omit` function
* ES6 spread operator (`...props`)

**Pros and Cons of Each Approach**

### Lodash's `omit` Function

Pros:

* Simple to use: Just pass an array of property names to omit.
* Fast: Optimized for performance.

Cons:

* Not native JavaScript: Requires the Lodash library, which may not be available in all environments.
* May require additional setup: The benchmark requires a global Lodash variable (`lodash`) to be set up before running the test.

### ES6 Spread Operator

Pros:

* Native JavaScript: No external libraries required.
* Simple and concise syntax: Easy to read and write.

Cons:

* Performance overhead: The spread operator can create temporary objects, which may incur performance penalties.

**Other Considerations**

* Memory usage: Both approaches may have different memory footprints, with the `omit` function potentially using more memory due to the creation of a new object.
* Browser support: Both approaches are likely supported by most modern browsers. However, older browsers might not support the ES6 spread operator.

**Library Used (Lodash)**

The Lodash library is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object creation, and more. In this benchmark, the `omit` function is used to filter out certain properties from an object.

**Special JS Feature/Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. Both approaches use standard JavaScript syntax and libraries (Lodash for the first approach).

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.134 YaBrowser/22.7.0.1925 Yowser/2.5 Safari/537.36

Browser/OS: Yandex Browser 22 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash Omit	582.9 Ops/sec
ES6 spread	365.5 Ops/sec

Related benchmarks:

Lodash omit Vs. es6 rest spread (version: 0)

Comparing performance of: Lodash Omit vs ES6 spread

Created: 6 years ago by: Registered User

Jump to the latest result

Lodash Omit

ES6 spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 23 days ago):