Benchmark: Lodash.js diff vs equal

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

function getRandomInt(max) {
  return Math.floor(Math.random() * max);
}

var arr2 = [];
var arr1 = [];
for(var index1123123; index1123123 <= 1000000; index1123123++ ){
	const i = getRandomInt(1000);
  	const o = getRandomInt(1000);
    arr1.push(i);
  	arr2.push(o);
}

Tests:

Lodash.js isEqual
_.isEqual(arr1, arr2);
lodash.js difference
const mytest = _.difference(arr1, arr2); (mytest.length == 0)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash.js isEqual
lodash.js difference

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested, compared, and other considerations.

**Benchmark Definition**

The benchmark definition represents two test cases:

1. `_.isEqual(arr1, arr2);`
2. `const mytest = _.difference(arr1, arr2) && (mytest.length == 0);`

Both tests are comparing the equality of two arrays, `arr1` and `arr2`.

**Options Compared**

Two approaches are being compared:

1. **Lodash.js `isEqual` method**: This method checks if two arrays are identical, including their order and values.
2. **Lodash.js `difference` method with a conditional assertion**: This method returns the difference between two arrays and assigns it to `mytest`. The test then checks if `mytest` is empty.

**Pros and Cons of each approach**

1. **Lodash.js `isEqual` method**:
	* Pros: Simple, efficient, and widely used.
	* Cons: May not be suitable for large datasets or arrays with duplicate values.
2. **Lodash.js `difference` method with a conditional assertion**:
	* Pros: Returns the actual difference between the two arrays, making it easier to understand and debug the result.
	* Cons: May be slower than the `isEqual` method due to the additional computation.

**Library: Lodash**

Lodash is a popular JavaScript library that provides various utility functions for tasks like array manipulation, object processing, and more. The `isEqual`, `difference`, and other methods are part of this library. By using Lodash, developers can leverage its extensive set of algorithms and data structures to simplify their code.

**Special JS Feature or Syntax**

There doesn't appear to be any special JavaScript features or syntax used in the provided benchmark definition. However, it's worth noting that the use of `const` for variable declarations is a modern JavaScript feature (ES6+) that was adopted relatively recently.

**Other Alternatives**

If you don't want to rely on Lodash, you could implement your own array comparison functions using JavaScript's built-in methods, such as:

* For `isEqual`: Compare each element of the arrays individually or use a library like `arrays-equal`.
* For `difference`: Use a loop or a library like `lodash-difference` (which is similar to Lodash but doesn't include all its features).

Keep in mind that writing your own array comparison functions can be more verbose and error-prone than using a well-tested library like Lodash.

**Benchmark Preparation Code**

The preparation code generates two large arrays, `arr1` and `arr2`, with random integers. This creates a microbenchmark scenario where the performance of `isEqual` and `difference` methods is measured against each other.

**Test Results**

The latest benchmark results show that Chrome 101 has faster executions per second for both tests. However, since the difference in performance is relatively small (about 12%), it might not be noticeable in real-world applications.

Related benchmarks:

Lodash.js diff vs equal (version: 0)

Comparing performance of: Lodash.js isEqual vs lodash.js difference

Created: 4 years ago by: Guest

Jump to the latest result

Lodash.js isEqual

lodash.js difference

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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