Benchmark: Lodash.isEqual vs JSON.stringify: Deep

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>

Script Preparation code:

a={a:{b:[1,2,3]}}
b={a:{b:[1,2,3]}}

Tests:

Lodash.isEqual
_.isEqual(a,b)
JSON.stringify
JSON.stringify(a) === JSON.stringify(b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash.isEqual
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36

Browser/OS: Chrome 99 on Windows

View result in a separate tab

Test name	Executions per second
Lodash.isEqual	475412.4 Ops/sec
JSON.stringify	642889.9 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 benchmark and explain what's being tested.

**Benchmark Overview**

MeasureThat.net is a platform that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares two approaches for checking equality between objects: Lodash's `isEqual` function and the `JSON.stringify` method.

**What is being tested?**

The benchmark tests how efficient each approach is for checking if two objects are equal, specifically for deep object structures. This means that both objects have nested arrays or objects as values.

**Options compared**

There are two options being compared:

1. **Lodash's `isEqual` function**: This function is a popular utility function in the Lodash library that compares two objects and returns `true` if they are equal, and `false` otherwise.
2. **JSON.stringify method**: This method is a built-in JavaScript method that converts an object to a JSON string, which can be compared with another JSON string.

**Pros and Cons of each approach**

1. **Lodash's `isEqual` function**:
	* Pros:
		+ Fast and efficient for deep objects
		+ Handles edge cases like null or undefined values
		+ Part of the Lodash library, which is widely used and maintained
	* Cons:
		+ Requires an additional library (Lodash) to be included in the test environment
2. **JSON.stringify method**:
	* Pros:
		+ Built-in to JavaScript, so no additional library required
		+ Can be used for other purposes beyond equality checking
	* Cons:
		+ Slower than Lodash's `isEqual` function for deep objects
		+ May not handle edge cases as well as Lodash

**Library: JSON.stringify**

JSON.stringify is a built-in JavaScript method that converts an object to a JSON string. In the context of this benchmark, it's used to compare two objects by converting them to JSON strings and checking if they are equal.

**Special JS feature/syntax: None**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Other alternatives**

If you're looking for alternative approaches to equality checking, here are a few:

1. **Using the `===` operator**: While not recommended for deep object structures, using the `===` operator can be faster than Lodash's `isEqual` function.
2. **Implementing your own equality function**: You can write your own equality function using recursion or iteration to compare two objects.
3. **Using a library like Object Compare**: There are other libraries available that specialize in equality checking for objects, such as Object Compare.

Keep in mind that the choice of approach depends on your specific use case and performance requirements.

Related benchmarks:

Lodash.isEqual vs JSON.stringify: Deep (version: 0)

Comparing performance of: Lodash.isEqual vs JSON.stringify

Created: 3 years ago by: Guest

Jump to the latest result

Lodash.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):