Benchmark: Lodash isEqual test with different number of properties

HTML Preparation code:

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

Script Preparation code:

// 1 level deep
window.foo1 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar1 = { a: 1, b: 3, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };

// 2 levels deep
window.foo2 = { a: 1, b: 2, c: { a: 1, b: 2 } };
window.bar2 = { a: 1, b: 2, c: { a: 1, b: 3 } };

// 3 levels deep
window.foo3 = { a: 1, b: 2 };
window.bar3 = { a: 1, b: 3 };

Tests:

_.isEqual Level 1
_.isEqual(window.foo1, window.bar1)
JSON.stringify Level 1
JSON.stringify(window.foo1) === JSON.stringify(window.bar1);
_.isEqual Level 2
_.isEqual(window.foo2, window.bar2)
JSON.stringify Level 2
JSON.stringify(window.foo2) === JSON.stringify(window.bar2);
_.isEqual Level 3
_.isEqual(window.foo3, window.bar3)
JSON.stringify Level 3
JSON.stringify(window.foo3) === JSON.stringify(window.bar3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual Level 1
JSON.stringify Level 1
_.isEqual Level 2
JSON.stringify Level 2
_.isEqual Level 3
JSON.stringify Level 3

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition:**

The benchmark is testing the performance of two approaches to compare two objects:

1. `_.isEqual(window.fooX, window.barX)`: This approach uses the Lodash library to perform an equality check between two objects using the `isEqual` function.
2. `JSON.stringify(window.fooX) === JSON.stringify(window.barX)`: This approach uses a simple string comparison by converting both objects to strings using `JSON.stringify`.

**Options being compared:**

Two approaches are being tested:

* Lodash's `isEqual` function
* A simple string comparison using `JSON.stringify`

**Pros and Cons of each approach:**

1. **Lodash's `isEqual` function:**
	* Pros:
		+ More accurate equality check, as it takes into account the structure and properties of the objects.
		+ Handles complex object comparisons more efficiently than a simple string comparison.
	* Cons:
		+ Adds overhead due to the library's complexity and potential optimization overhead.
		+ May have performance implications depending on the size and complexity of the objects being compared.
2. **Simple string comparison using `JSON.stringify`:**
	* Pros:
		+ Lightweight and simple, with minimal overhead.
		+ Can be faster for small objects or simple comparisons.
	* Cons:
		+ Inaccurate equality check, as it only compares the strings representation of the objects, not their actual contents.
		+ May fail for complex object structures or nested properties.

**Lodash library:**

The Lodash library is a popular JavaScript utility library that provides a set of functions for common tasks such as array manipulation, string manipulation, and object manipulation. The `isEqual` function is part of this library and is designed to perform an accurate equality check between two objects.

**Special JS feature or syntax:**

There are no special features or syntax mentioned in the benchmark definition. It appears to be a standard JavaScript code with Lodash library inclusion.

**Other alternatives:**

For testing object comparison, other approaches could be considered:

* Using a custom implementation of the `isEqual` function
* Using a different library like Underscore.js or Ramda for equality checks
* Implementing a simple string comparison using techniques like JSON parsing and DOM manipulation

However, Lodash's `isEqual` function is likely the most efficient and accurate approach for this specific benchmark, considering its implementation and optimization.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0

Browser/OS: Firefox 61 on Windows 7

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	248455.0 Ops/sec
JSON.stringify Level 1	196176.7 Ops/sec
_.isEqual Level 2	197155.4 Ops/sec
JSON.stringify Level 2	243119.9 Ops/sec
_.isEqual Level 3	218436.8 Ops/sec
JSON.stringify Level 3	386586.8 Ops/sec

Related benchmarks:

Lodash isEqual test with different number of properties (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual Level 1 vs JSON.stringify Level 1 vs _.isEqual Level 2 vs JSON.stringify Level 2 vs _.isEqual Level 3 vs JSON.stringify Level 3

Created: 6 years ago by: Guest

Jump to the latest result

_.isEqual Level 1

JSON.stringify Level 1

_.isEqual Level 2

JSON.stringify Level 2

_.isEqual Level 3

JSON.stringify Level 3

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):