Benchmark: Lodash Array isEqual vs Native

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

window.foo = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
window.bar = ['a', 'c', 'b', 'd', 'e', 'f', 'g', 'h', 'j', 'i', 'k', 'l', 'm', 'n', 'p', 'o', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
Native
if (window.foo.length !== window.bar.length) return false; const uniqueValues = new Set([...window.foo, ...window.bar]); for (const v of uniqueValues) { const fooCount = window.foo.filter(e => e === v).length; const barCount = window.bar.filter(e => e === v).length; if (fooCount !== barCount) return false; } return true;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
Native

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser/OS: Chrome 89 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
_.isEqual	1444917.4 Ops/sec
Native	64896.0 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 JSON and explain what's being tested, compared, and some pros/cons of different approaches.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question compares the performance of Lodash's `isEqual` function with a native implementation.

**Test Case 1: Lodash `isEqual`**

The first test case uses the following code:
```javascript
_.isEqual(window.foo, window.bar);
```
Here, we're calling the `isEqual` function from the Lodash library and passing two arrays, `window.foo` and `window.bar`, as arguments.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object creation, and string manipulation. In this case, the `isEqual` function is used to compare two arrays for equality.

**Pros and Cons:**

* Pros:
	+ Concise and readable code
	+ Provides a standardized way to compare arrays for equality
	+ Can be useful in many scenarios where array comparison is required
* Cons:
	+ May have performance overhead due to the library's complexity
	+ Requires including an external library, which may add latency

**Test Case 2: Native Implementation**

The second test case uses the following code:
```javascript
if (window.foo.length !== window.bar.length) return false;
const uniqueValues = new Set([...window.foo, ...window.bar]);
for (const v of uniqueValues) {
    const fooCount = window.foo.filter(e => e === v).length;
    const barCount = window.bar.filter(e => e === v).length;
    if (fooCount !== barCount) return false;
}
return true;
```
This implementation is a native JavaScript solution that manually checks for array equality.

**Pros and Cons:**

* Pros:
	+ No external library dependencies
	+ Can be more optimized for performance, as it's native code
	+ May provide better control over the comparison logic
* Cons:
	+ More verbose and complex code
	+ Requires manual error handling and edge case consideration

**Other Considerations**

In addition to the above test cases, there may be other approaches to comparing arrays in JavaScript, such as using `JSON.stringify` or a custom implementation. However, these are not explicitly tested in the provided benchmark.

**Alternatives**

Some alternative approaches to comparing arrays include:

* Using `Array.prototype.every()` and `Array.prototype.some()`
* Utilizing `Set` data structures and iterating over them
* Implementing a custom algorithm for array comparison

However, it's worth noting that these alternatives may not be as widely supported or efficient as the Lodash `isEqual` function.

Related benchmarks:

Lodash Array isEqual vs Native (version: 0)

Comparing performance of: _.isEqual vs Native

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual

Native

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):