Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison

HTML Preparation code:

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

Script Preparation code:

window.foo = { 'content': 'lorem', 'dynamicAttributes': { 'content': { 'isActive': true, 'provider': '__current_post', 'source' : 'post-title' } }, 'level': 2 };
window.bar = { 'content': 'lorem', 'dynamicAttributes': { 'content': { 'isActive': true, 'provider': '__current_post1', 'source' : 'post-title' } }, 'level': 2 };

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: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:82.0) Gecko/20100101 Firefox/82.0

Browser/OS: Firefox 82 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
_.isEqual	260907.3 Ops/sec
JSON.stringify	359990.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain the benchmark and its test cases.

**What is being tested?**

The benchmark compares two approaches for equality comparison:

1. `JSON.stringify()` method, which converts an object into a JSON string and then compares it with another JSON string.
2. Lodash's `isEqual()` function, which performs a deep equality check on two objects.

**Options compared:**

* **JSON.stringify()**: This approach involves converting both objects to JSON strings and comparing the resulting strings for equality. The pros of this approach include:
	+ Simple implementation
	+ Wide browser support (as it relies on the standard `JSON.stringify()` method)
	+ Fast execution time, as it only requires string comparison
However, the cons include:
	+ May not work correctly with complex objects or nested structures
	+ Can be slow for large objects due to the overhead of creating and comparing JSON strings
* **Lodash's `isEqual()` function**: This approach uses Lodash's implementation of a deep equality check. The pros of this approach include:
	+ More accurate comparison, especially for complex objects with nested structures
	+ Faster execution time than manually converting to JSON strings (as it avoids the overhead of string creation and comparison)
However, the cons include:
	+ May not work correctly in older browsers that don't support Lodash or its dependencies
	+ Requires including an external library (Lodash) in the test code

**Library:**

* **Lodash**: A popular JavaScript utility library that provides various functions for data manipulation, array operations, and more. In this benchmark, `isEqual()` is used as a comparison function.

**Special JS feature or syntax:**

None mentioned in this benchmark.

**Other alternatives:**

In addition to the two options compared in this benchmark, other approaches for equality comparison include:

* **Manual implementation**: Writing custom code to compare two objects manually, without relying on any external libraries.
* **JSON5**: A JSON-like data format that can be used for equality comparison, although it may not provide better performance or accuracy than `JSON.stringify()`.
* **DOM-based comparison**: Using the browser's DOM APIs (e.g., `Object.is()`) to compare objects, although this approach may not work correctly with all types of objects.

Overall, the choice of comparison method depends on factors such as performance requirements, browser support, and the complexity of the objects being compared.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison (version: 0)

Comparing performance of: _.isEqual vs JSON.stringify

Created: 4 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 one month ago):