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

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.1 Safari/605.1.15

Browser/OS: Safari 26 on Mac OS X 10.15.7

View result in a separate tab

ES6 spread

2K/s

Lodash Omit

899/s

View exact numbers

Test name	Executions per second
✓ ES6 spread	1,825 Ops/sec
Lodash Omit	899 Ops/sec

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

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

Comparing performance of: `Lodash Omit vs ES6 spread`

Created: 8 years ago by: Registered User

Go to the latest result

Lodash Omit

ES6 spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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

Comparing performance of: Lodash Omit vs ES6 spread

Created: 8 years ago by: Registered User

Go to the latest result

Lodash Omit

ES6 spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `Lodash Omit vs ES6 spread`