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

HTML Preparation code:

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

Script Preparation code:

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

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

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0

Browser/OS: Firefox 140 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual	1330232.1 Ops/sec
JSON.stringify	1597074.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what's being tested in the provided JSON benchmark.

**What is being tested?**

The benchmark is comparing the performance of two approaches:

1. **Lodash's `isEqual` function**: This function is used to compare two objects for equality, considering both value and reference.
2. **JSON string comparison**: This approach compares the two objects by converting them to JSON strings and then checking if they are equal.

**Options compared:**

* Lodash's `isEqual` vs standard JavaScript object comparison (using JSON strings)

**Pros and Cons of each approach:**

* **Lodash's `isEqual`:**
	+ Pros:
		- Handles nested objects and arrays
		- Handles cyclic references
		- Fast execution time due to optimized implementation
	+ Cons:
		- Adds an external dependency (Lodash library)
		- May have slower startup times due to library loading
* **JSON string comparison:**
	+ Pros:
		- Does not require an external library
		- Fast execution time since it only involves string comparisons
	+ Cons:
		- May not handle nested objects or arrays correctly (depending on implementation)
		- Can be slower for large objects due to increased string creation and comparison overhead

**Library usage:**

The benchmark uses the Lodash library, which is a popular utility library for JavaScript that provides a set of helper functions for various tasks, including object manipulation. In this case, the `isEqual` function is used as the basis for comparison.

**Special JS feature or syntax:**

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

**Benchmark preparation code and HTML preparation code:**

The `Script Preparation Code` section defines two global objects (`window.foo` and `window.bar`) with similar properties, which will be used as input for the comparison. The `Html Preparation Code` includes a script tag that loads the Lodash library (version 4.17.4), which is used by the `isEqual` function.

**Alternative approaches:**

Other alternatives for comparing object equality could include:

* Using built-in JavaScript methods like `Object.is()` or `Object.compare()`
* Implementing custom comparison logic using recursion or iteration
* Using a different library, such as Moment.js (for date comparisons) or Immutable.js (for immutable data structures)

Keep in mind that the choice of approach depends on specific requirements and constraints, such as performance, scalability, and maintainability.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Small Objects. (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

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