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

HTML Preparation code:

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

Script Preparation code:

window.foo = ['cat', 'dog', 'bird'];
window.bar = ['cat', 'dog', 'bird'];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
window.foo.join('') === window.bar.join('');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.stringify

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.

I'll break down the benchmark and explain what's being tested, compared, and discussed.

**Benchmark Overview**

The benchmark measures the performance of two approaches for comparing equality in shallow arrays of strings: using the `_.isEqual` function from Lodash and using the `join()` method with an empty string as a comparator.

**Options Compared**

1. **Lodash's _.isEqual()**: This function is used to compare two values for deep equality, which can be useful when working with complex data structures.
2. **Array.join('') Equality Comparison**: This approach uses the `join()` method of an array as a comparator to check if two arrays contain the same elements in the same order. The empty string (`''`) is used as the separator.

**Pros and Cons**

1. **Lodash's _.isEqual()**:
	* Pros: It's a well-tested, optimized function that can handle complex data structures.
	* Cons: It may have higher overhead due to its deep equality checking capabilities.
2. **Array.join('') Equality Comparison**:
	* Pros: This approach is lightweight and simple, making it suitable for performance-critical code.
	* Cons: It's less flexible than _.isEqual() and might not work well with complex data structures.

**Other Considerations**

* The benchmark assumes that the input arrays contain only strings. If the arrays can contain other types of elements, additional considerations may be needed.
* The use of an empty string as a comparator in the Array.join('') approach is unusual and might not be the most effective way to compare arrays.

**Library and Purpose**

The Lodash library provides various utility functions, including _.isEqual(), which helps developers work with complex data structures. In this benchmark, _.isEqual() is used to perform deep equality comparisons.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax mentioned in the benchmark definition or the test cases.

**Alternatives**

If you're looking for alternative approaches to comparing arrays of strings, consider:

1. Using the `===` operator directly: `if (window.foo === window.bar) { ... }`
2. Implementing a simple custom equality function using bitwise operations and string comparisons.
3. Utilizing modern JavaScript features like `Set` or `Map` data structures for efficient array comparison.

Keep in mind that these alternatives might not offer the same level of flexibility or performance as _.isEqual() or the Array.join('') Equality Comparison approach, depending on your specific use case.

Related benchmarks:

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

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 6 years ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

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):