Benchmark: Lodash 4.17.15 omit vs es omit vs rest spread

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Tests:

Lodash
const obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1, h:1, i:1, } const n = _.omit(obj, ['a','d','i']);
Object desctruct
const obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1, h:1, i:1, } const omit = (originalObj = {}, keysToOmit = []) => Object.fromEntries( Object.entries(originalObj) .filter(([key]) => !keysToOmit.includes(key)) ) const n = omit(obj, ['a','d','i']);
rest operator
const obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1, h:1, i:1, } const { a, d, i, ...n } = obj;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
Object desctruct
rest operator

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash	1611688.6 Ops/sec
Object desctruct	2645442.2 Ops/sec
rest operator	6528133.5 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, compared, and analyzed.

**Benchmark Overview**

The benchmark compares three approaches to omit or remove specific keys from an object:

1. **Lodash**: Using the `_.omit` function from the Lodash library.
2. **Object Desctruct**: Using a custom implementation with destructuring assignment (Rest Operator).
3. **Custom Implementation**: A hand-crafted function that uses `Object.fromEntries`, `Object.entries`, and filtering to achieve the same result.

**Options Compared**

The benchmark tests the performance of these three approaches:

* Lodash: `_.omit` function from the library.
* Object Desctruct: Using a custom implementation with destructuring assignment (Rest Operator).
* Custom Implementation: A hand-crafted function that uses `Object.fromEntries`, `Object.entries`, and filtering.

**Pros and Cons**

Here's a brief summary of each approach:

1. **Lodash**: Pros:
	* Well-maintained, widely used library.
	* Provides a consistent API for omitting keys.
Cons:
	* Requires an additional dependency (Lodash library).
2. **Object Desctruct**: Pros:
	* Native JavaScript implementation, no external dependencies.
	* Efficient and concise code.
Cons:
	* Limited to modern JavaScript environments (ES6+).
3. **Custom Implementation**: Pros:
	* Tailored to specific use case, potentially more efficient.
Cons:
	* Requires manual implementation, which can be error-prone.

**Library: Lodash**

Lodash is a popular utility library for JavaScript that provides a wide range of functions for tasks like array manipulation, object transformation, and more. The `_.omit` function is part of this library and is used to remove specific keys from an object.

**JavaScript Features/Syntax**

The benchmark uses the following features:

* **Destructuring assignment (Rest Operator)**: Introduced in ES6, it allows extracting multiple values from an array or object.
* **Object.fromEntries()**: Introduced in ES2015, it creates a new object from key-value pairs.

These features are used to implement the `Object Desctruct` approach and the custom implementation, respectively.

**Alternative Approaches**

Other alternatives for omitting keys from an object include:

1. Using a `for...in` loop and manual filtering.
2. Using `Array.prototype.filter()` on the object's key-value pairs (less efficient).
3. Using a different library or framework-specific solution (e.g., React's `useMemo` hook).

Keep in mind that each approach has its trade-offs, and the best choice depends on the specific use case and performance requirements.

Related benchmarks:

Lodash 4.17.15 omit vs es omit vs rest spread (version: 0)

Comparing performance of: Lodash vs Object desctruct vs rest operator

Created: one year ago by: Guest

Jump to the latest result

Lodash

Object desctruct

rest operator

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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