Benchmark: Equality test - MeasureThat.net

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: 3 };
window.bar1 = { a: 1, b: 3, c: 3 };

// 2 levels deep
window.foo2 = { a: 1, b: 2, c: { a: 1, b: 2, c: 3 } };
window.bar2 = { a: 1, b: 2, c: { a: 1, b: 3, c: 3 } };

// 3 levels deep
window.foo3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 2 } } };
window.bar3 = { a: 1, b: 2, c: { a: 1, b: 2, c: { a: 1, b: 4 } } };

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual Level 1
Equal Level 1
_.isEqual Level 2
_.isEqual Level 3

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided JSON represents a benchmark suite that tests different approaches to comparing objects in JavaScript. The benchmark is focused on testing the equality of two objects, `window.foo1` and `window.bar1`, and their nested versions (`foo2` and `bar2`, as well as `foo3` and `bar3`). The goal is to determine which approach is faster.

**Options being compared**

There are four options being compared:

1. **Direct equality comparison using the `===` operator**: This is a straightforward approach where you simply compare the two objects using the `===` operator.
2. **Using the Lodash `isEqual` function**: This approach uses a dedicated library, Lodash, to perform the equality check.

**Pros and cons of each approach**

1. **Direct equality comparison (`===`)**:
	* Pros: Simple, widely supported, and efficient for simple cases.
	* Cons: Can be slow for complex objects with nested structures or large amounts of data.
2. **Using Lodash `isEqual` function**:
	* Pros: Provides a robust implementation for handling complex object comparisons, can handle various types of data, and is often faster than direct comparison for complex cases.
	* Cons: Requires including the Lodash library, which may add overhead.

**Library usage - Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for working with arrays, objects, and more. In this benchmark, `isEqual` is used to perform equality checks on objects. The `isEqual` function can handle various types of data, including nested objects, arrays, and primitive values.

**Special JS feature/syntax - None mentioned**

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

**Other alternatives**

If you wanted to implement a custom comparison function instead of using the Lodash `isEqual` function, you could consider using a recursive function that checks the properties of each object and compares them. This approach would require writing your own implementation, which might be more time-consuming but allows for fine-grained control over the comparison process.

Keep in mind that this benchmark is focused on comparing objects, so alternative approaches might not be as relevant or efficient. However, if you're looking to implement a custom comparison function, it's worth exploring.

I hope this explanation helps!

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser/OS: Chrome 102 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEqual Level 1	648400.7 Ops/sec
Equal Level 1	1626244.5 Ops/sec
_.isEqual Level 2	438647.7 Ops/sec
_.isEqual Level 3	350072.9 Ops/sec

Related benchmarks:

Equality test (version: 0)

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

Created: 2 years ago by: Guest

Jump to the latest result

_.isEqual Level 1

Equal Level 1

_.isEqual Level 2

_.isEqual Level 3

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):