Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Small Objects, with differences.

HTML Preparation code:

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

Script Preparation code:

window.foo = {animal: 'dog', age: 7, breed: 'Chihuahua'};
window.bar = {animal: 'cat', age: 12, breed: 'Kiltro'};

Tests:

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

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

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested.

**Benchmark Overview**

The benchmark compares two approaches for equality comparison:

1. `_.isEqual` from the Lodash library, which is a higher-order function that takes two values as input and returns a boolean indicating whether they are equal.
2. `JSON.stringify` with a manual comparison using the `===` operator, which converts both objects to strings and then compares them.

**Options Compared**

The benchmark tests the following options:

* Using the Lodash library (`_.isEqual`) vs
* Manual stringification and comparison (`JSON.stringify`)

**Pros and Cons of Each Approach:**

1. **Lodash (_.isEqual)**:
	* Pros:
		+ Faster, as it uses a specialized implementation for equality checks.
		+ More readable, as the function name clearly conveys its purpose.
	* Cons:
		+ Additional dependency on Lodash library, which may not be included in all projects.
		+ May have a higher memory footprint due to the library's overhead.
2. **Manual Stringification and Comparison (`JSON.stringify`)**:
	* Pros:
		+ No additional dependencies, as it only relies on built-in JavaScript functions.
		+ Can be more efficient for small objects, as stringification is often faster than function calls.
	* Cons:
		+ Less readable, as the manual comparison can be less obvious and may require additional effort to understand.
		+ More error-prone, as the conversion to strings may introduce unexpected behavior if not handled correctly.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as:

* Array manipulation
* Object transformation
* Equality checks (like `_.isEqual`)
* String manipulation

In this benchmark, Lodash's `_.isEqual` function is used to compare two objects for equality.

**Special JS Feature or Syntax: None**

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is solely on comparing the performance of two different approaches for equality checks.

**Other Alternatives**

If you're looking for alternative libraries or implementations for equality checks, some options include:

* `JSON.stringify` with a custom comparison function (e.g., using a library like `json-stringify-safe`)
* Other equality check libraries like `fast-equal`, `deep-equal`, or `should`
* Built-in JavaScript methods like `Object.is()` (available in modern browsers and Node.js)

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36

Browser/OS: Chrome 76 on Mac OS X 10.14.5

View result in a separate tab

Test name	Executions per second
_.isEqual	752694.6 Ops/sec
JSON.stringify	638293.1 Ops/sec

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Small Objects, with differences. (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 5 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 25 days ago):