Benchmark: Lodash.isEqual vs Array.join() Equality Comparison for Shallow Array of integers.

HTML Preparation code:

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

Script Preparation code:

window.foo = [14003548,
    14003515,
    14003547,
    14003518,
    14003517,
    14003521,
    14003520,
    14003519,
    14003522,
    14003523,
    14003524,
    14003525,
    14003340,
    14003492,
    14003491,
    14003514,
    14003513,
    14003511,
    14003512,
    14003509,
    14003508,
    14003507,
    14003494,
    14003493,
    14003495,
    14003496,
    14003497,
    14003498,
    14003499,
    14003501,
    14003500,
    14003502,
    14003503,
    14003504,
    14003531,
    14003506,
    14003505,
    14003516,
    14003510
];
window.bar = [14003340,
    14003491,
    14003492,
    14003493,
    14003494,
    14003495,
    14003496,
    14003497,
    14003498,
    14003499,
    14003500,
    14003501,
    14003502,
    14003503,
    14003504,
    14003505,
    14003506,
    14003507,
    14003508,
    14003509,
    14003510,
    14003511,
    14003512,
    14003513,
    14003514,
    14003515,
    14003516,
    14003517,
    14003518,
    14003519,
    14003520,
    14003521,
    14003522,
    14003523,
    14003524,
    14003525,
    14003531,
    14003547,
    14003548
];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
Array.join()
window.foo.join() === window.bar.join()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
Array.join()

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks and explore what's being tested in this particular benchmark.

**Benchmark Description**

The benchmark is designed to compare the performance of two approaches: `lodash.isEqual` and `Array.join()` for checking equality between shallow arrays of integers. The test data consists of two arrays, `foo` and `bar`, which contain a mix of duplicate and unique values.

**Options Being Compared**

There are two options being compared:

1. **`_.isEqual(window.foo, window.bar)`**: This is the first benchmark case, which uses the `lodash.isEqual` function to compare the contents of the two arrays. `_.isEqual` is a utility function provided by Lodash that checks if two values are equal.
2. **`window.foo.join() === window.bar.join()`**: The second benchmark case uses the `join()` method on each array and compares the results using the strict equality operator (`===`). This approach concatenates the elements of each array into strings and then compares these strings.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* **`_.isEqual(window.foo, window.bar)`**:
	+ Pros: Efficient use of Lodash's optimized implementation for equality checks.
	+ Cons: May be slower due to the overhead of importing and initializing Lodash.
* **`window.foo.join() === window.bar.join()`**:
	+ Pros: Simple and straightforward approach that leverages built-in JavaScript functionality.
	+ Cons: Less efficient than `_.isEqual`, as it requires concatenating elements into strings, which can be slower.

**Other Considerations**

When choosing between these two approaches, consider the following factors:

* Performance: If speed is crucial, `lodash.isEqual` might be a better choice due to its optimized implementation.
* Code complexity and readability: For more complex equality checks or when using Lodash functions extensively, `_.isEqual` can simplify code and reduce errors.

**Special JS Feature/Syntax**

In this benchmark, there isn't any special JavaScript feature or syntax being used. However, it's worth noting that the use of Lodash (`lodash.isEqual`) relies on importing a third-party library, which might not be desirable for all developers.

**Other Alternatives**

If you're interested in alternative approaches, consider:

* Using built-in `Array.prototype.every()` or `Array.prototype.includes()` methods, which can provide similar functionality to `_.isEqual`.
* Implementing custom equality checks using simple loops and bitwise operations.
* Leveraging other libraries or frameworks that offer optimized equality checks.

Keep in mind that each of these alternatives has its own trade-offs regarding performance, code complexity, and maintainability.

Related benchmarks:

Lodash.isEqual vs Array.join() Equality Comparison for Shallow Array of integers. (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs Array.join()

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual

Array.join()

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):