Benchmark: lodash vs native js array comparsion

Script Preparation code:

// 1 level deep
window.foo1 = [
  {id: "1035257027", person_id: "1043549930", group_id: "551225445", avatar_url: "http://people.pco.test/static/no_photo_thumbnail_gray.png", email_address: "pico@pco.bz"},
  {id: "1035257027", person_id: "1043549930", group_id: "551225445", avatar_url: "http://people.pco.test/static/no_photo_thumbnail_gray.png", email_address: "pico@pco.bz"},
];
window.bar1 = [
  {id: "1035257027", person_id: "1043549930", group_id: "551225445", avatar_url: "http://people.pco.test/static/no_photo_thumbnail_gray.png", email_address: "pico@pco.bz"},
  {id: "1035257025", person_id: "1043549930", group_id: "551225445", avatar_url: "http://people.pco.test/static/no_photo_thumbnail_gray.png", email_address: "pico@pco.bz"},
];

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
window.foo1.every(f => window.bar1.includes(f)))
window.foo1.every(f => window.bar1.includes(f))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual Level 1
window.foo1.every(f => window.bar1.includes(f)))

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	1225917.2 Ops/sec
window.foo1.every(f => window.bar1.includes(f)))	6285059.0 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 benchmark and its options for you.

**Benchmark Description:**

The provided benchmark is comparing the performance of two approaches to check if two arrays are equal:

1. Using Lodash's `isEqual` function
2. Using native JavaScript array comparison (with `every` and `includes` methods)

**Options Compared:**

* **Lodash's `isEqual` function**: This function checks if two objects or arrays are deeply equal.
	+ Pros:
		- Easy to use, as it abstracts away the complexity of deep equality checking.
		- Works for both objects and arrays.
	+ Cons:
		- Can be slower than native JavaScript implementation due to its abstraction.
		- May not work correctly with certain data types or edge cases (e.g., NaN, Infinity).
* **Native JavaScript array comparison**: This approach uses the `every` method to check if every element in one array exists in another array using the `includes` method.

**Pros and Cons:**

* Lodash's `isEqual` function:
	+ Pros: Easy to use, works for both objects and arrays.
	+ Cons: May be slower than native JavaScript implementation, may not work correctly with certain data types or edge cases.
* Native JavaScript array comparison:
	+ Pros: Typically faster than Lodash's `isEqual` function, more lightweight.
	+ Cons: Requires manual handling of the logic to compare arrays.

**Library and Its Purpose:**

The benchmark uses the Lodash library, which is a popular JavaScript utility library that provides various functions for tasks like string manipulation, array and object manipulation, and more. The `isEqual` function is part of this library and is used here to compare two arrays.

**Special JS Feature/Syntax:**

There are no special JS features or syntax mentioned in the benchmark code. It uses standard JavaScript syntax and methods like `every`, `includes`, and template literals for string manipulation.

**Other Alternatives:**

For array comparison, other alternatives to Lodash's `isEqual` function could be:

* Using the `===` operator directly on arrays (which is not recommended as it only checks reference equality)
* Using the `JSON.stringify()` method to compare arrays (which can be slower than native JavaScript implementation)

For more complex object comparisons, other libraries like Jest or TypeScript might be used.

**Additional Considerations:**

When choosing between Lodash's `isEqual` function and native JavaScript array comparison, consider factors like performance, maintainability, and readability of the code. If you need to perform deep equality checks on objects or arrays, Lodash's `isEqual` function might be a good choice. However, if you're working with simple cases where only reference equality matters, using native JavaScript methods directly might be sufficient.

Keep in mind that this benchmark is specifically testing two approaches for comparing arrays, so the results should help determine which approach performs better in terms of speed and accuracy for similar use cases.

Related benchmarks:

lodash vs native js array comparsion (version: 0)

Comparing performance of: _.isEqual Level 1 vs window.foo1.every(f => window.bar1.includes(f)))

Created: 2 years ago by: Guest

Jump to the latest result

_.isEqual Level 1

window.foo1.every(f => window.bar1.includes(f)))

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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