Benchmark: Lodash isEquals vs. JSON Stringify

HTML Preparation code:

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

Script Preparation code:

window.a = { major: 1, minor: 0, patch: 0 };
window.b = { major: 1, minor: 0, patch: 0 };

Tests:

lodash isEquals
_.isEqual(window.a, window.b);
JSON.stringify strict
JSON.stringify(window.a) === JSON.stringify(window.b);
JSON.stringify non-strict
JSON.stringify(window.a) == JSON.stringify(window.b);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash isEquals
JSON.stringify strict
JSON.stringify non-strict

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its components.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares three approaches: Lodash's `isEquals` function, strict JSON stringification (`JSON.stringify(window.a) === JSON.stringify(window.b)`), and non-strict JSON stringification (`JSON.stringify(window.a) == JSON.stringify(window.b)`).

**Script Preparation Code**

The script preparation code sets two objects in the global scope, `window.a` and `window.b`, with identical properties:

```javascript
window.a = { major: 1, minor: 0, patch: 0 };
window.b = { major: 1, minor: 0, patch: 0 };
```

This code creates two objects that are used as test subjects for the benchmark.

**Html Preparation Code**

The HTML preparation code includes a reference to Lodash's `lodash.min.js` library:

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

This ensures that Lodash is available during the benchmark execution.

**Individual Test Cases**

There are three test cases:

1. **Lodash isEquals**: This test case uses Lodash's `isEquals` function to compare `window.a` and `window.b`. The purpose of this function is to determine whether two objects have identical properties and values.
2. **JSON.stringify strict**: This test case compares the result of `JSON.stringify(window.a)` with the result of `JSON.stringify(window.b)` using a strict equality check (`===`). This ensures that both strings are identical, including their length and contents.
3. **JSON.stringify non-strict**: This test case compares the result of `JSON.stringify(window.a)` with the result of `JSON.stringify(window.b)` using a non-strict equality check (`==`). This allows for a more lenient comparison, where the focus is on whether both strings contain similar data, rather than exact identical values.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as array manipulation, string processing, and object inspection. In this benchmark, Lodash's `isEquals` function is used to compare objects.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax mentioned in the provided code. However, it's worth noting that some older browsers may not support modern JavaScript features like arrow functions or rest parameters.

**Alternatives**

The alternatives to these approaches depend on the specific use case:

* Instead of Lodash's `isEquals`, you could use the built-in `Object.keys()` and `JSON.stringify()` methods to compare objects. However, this approach is less efficient than using a dedicated function like `isEquals`.
* Strict JSON stringification (`JSON.stringify(window.a) === JSON.stringify(window.b)`) ensures that both strings are identical, but it may not work as expected if the objects have different properties or values.
* Non-strict JSON stringification (`JSON.stringify(window.a) == JSON.stringify(window.b)`) allows for a more lenient comparison, where similar data is considered equal. However, this approach may lead to false positives if the data is not exactly identical.

In summary, the benchmark compares three approaches: Lodash's `isEquals` function, strict JSON stringification, and non-strict JSON stringification. Each approach has its pros and cons, and the choice of approach depends on the specific use case and requirements.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser/OS: Chrome 118 on Linux

View result in a separate tab

Test name	Executions per second
lodash isEquals	506372.2 Ops/sec
JSON.stringify strict	462259.9 Ops/sec
JSON.stringify non-strict	467034.4 Ops/sec

Related benchmarks:

Lodash isEquals vs. JSON Stringify (version: 0)

Comparing performance of: lodash isEquals vs JSON.stringify strict vs JSON.stringify non-strict

Created: 2 years ago by: Guest

Jump to the latest result

lodash isEquals

JSON.stringify strict

JSON.stringify non-strict

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):