Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings. Testing 123

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
Object.values(window.foo);

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:

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/90.0.4430.212 Safari/537.36

Browser/OS: Chrome 90 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
_.isEqual	1119141.1 Ops/sec
JSON.stringify	1757460.6 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 JavaScript benchmark using MeasureThat.net.

**Benchmark Overview**

The benchmark compares the performance of two approaches to check for equality between two shallow arrays of strings: `lodash.isEqual` and `JSON.stringify`. The test is designed to measure which approach is faster.

**Options Compared**

There are only two options compared in this benchmark:

1. **_.isEqual (Lodash)**: This function checks if two values are deeply equal, meaning they have the same value, type, and structure.
2. **JSON.stringify**: This method converts an object into a JSON string, which can be used to compare its contents.

**Pros and Cons**

* **_.isEqual (Lodash)**:
	+ Pros: Provides a robust way to check for deep equality, including arrays and objects with nested structures.
	+ Cons: Can be slower than `JSON.stringify` due to its complexity and the overhead of traversing the data structures.
* **JSON.stringify**:
	+ Pros: Fast and simple to implement, as it only requires converting the object to a string.
	+ Cons: Does not provide any information about the structure or type of the objects being compared, which can lead to false positives.

**Library and Its Purpose**

The `lodash.isEqual` function is part of the popular Lodash library. Lodash provides a collection of reusable functions for common tasks in JavaScript, such as array manipulation, string processing, and object manipulation. In this case, `_.isEqual` is used to check if two values are deeply equal.

**Special JS Feature or Syntax**

There doesn't seem to be any special JavaScript features or syntax being tested in this benchmark. The focus is on the performance comparison between two existing functions.

**Other Alternatives**

If you're looking for alternative ways to compare arrays or objects, here are a few options:

* **Arrays.prototype.every()**: This method checks if every element in an array passes a test.
* **Arrays.prototype.some()**: This method checks if any element in an array passes a test.
* **Object.keys()** and **Array.prototype.map()**: These methods can be used to compare objects by iterating over their keys and values.

In conclusion, the MeasureThat.net benchmark provides a simple way to compare the performance of two approaches to check for equality between shallow arrays of strings. While `_.isEqual` provides a robust way to check for deep equality, `JSON.stringify` is faster but may lead to false positives due to its simplicity.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings. Testing 123 (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

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):