Benchmark: Lodash omit vs es omit vs rest spread

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/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: 9 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Lodash	1478290.9 Ops/sec
Object desctruct	3052438.0 Ops/sec
rest operator	6277340.5 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 provided benchmark and its test cases.

**Benchmark Overview**

The benchmark is designed to compare the performance of three different approaches for removing specific keys from an object:

1. **Lodash omit**: Uses the `_.omit()` function from the Lodash library to remove specified keys from an object.
2. **Object destructuring with rest operator**: Uses the rest operator (`...`) to create a new object that excludes certain properties.
3. **Custom implementation with Object.fromEntries() and filter()**: A custom implementation using `Object.fromEntries()` and `filter()` to achieve similar results.

**Options Compared**

The benchmark compares the performance of these three approaches:

* **Pros and Cons of each approach:**
	+ Lodash omit:
		- Pros: Easy to use, well-maintained library with a wide range of utility functions.
		- Cons: Adds an extra dependency to the project, may have a slower execution time due to the overhead of the library.
	+ Object destructuring with rest operator:
		- Pros: Lightweight, concise syntax, and good performance since it only creates a new object without modifying the original one.
		- Cons: Limited to JavaScript 12+ syntax, may require additional setup for older browsers or environments.
	+ Custom implementation:
		- Pros: Tailored for this specific use case, potentially optimized for better performance.
		- Cons: More complex codebase, requires manual optimization and testing.
* **Other considerations:**
	+ The benchmark assumes that the input objects are large enough to benefit from the optimizations provided by these approaches. For small objects or simple key removals, other factors like memory allocation and garbage collection might become more significant than performance differences between these approaches.

**Library and Special JS Features**

* **Lodash**: A popular JavaScript utility library providing a wide range of functions for tasks such as string manipulation, array operations, and object transformation. `_.omit()` is used to remove specified keys from an object.
* **Rest operator (`...`)**: Introduced in JavaScript 12 (and later), this syntax allows for the creation of new objects that exclude certain properties.

**Test Case Explanation**

Each test case consists of a benchmark definition, which includes:

1. A sample object with multiple keys.
2. The approach to be tested (Lodash omit, Object destructuring with rest operator, or custom implementation).
3. A call to the function being benchmarked, passing in the object and an array of key names to omit.

**Alternatives**

Other alternatives for removing specific keys from objects include:

* **Using `Object.keys()`**, `Array.prototype.filter()`, and `Object.assign()`**: This approach involves manually iterating over the object's keys using `Object.keys()` and filtering out the unwanted ones. However, it can be less efficient than the approaches compared in this benchmark.
* **Utilizing `for...in` loops or `forEach()` methods**: Similar to the previous alternative, these loops can iterate over the object's properties but are generally considered slower and more verbose.

Keep in mind that the choice of approach often depends on the specific requirements and constraints of your project.

Related benchmarks:

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

Comparing performance of: Lodash vs Object desctruct vs rest operator

Created: 3 years ago by: Guest

Jump to the latest result

Lodash

Object desctruct

rest operator

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):