Benchmark: Lodash isEqual test fffw

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.15/lodash.min.js"></script>

Script Preparation code:

// flat
window.test = {a: 1, b:2, c: 3, d: 4};
window.test2 = {a: 1, b:2, c: 3, d: 4};

Tests:

flat isEqual
_.isEqual(window.test, window.test1)
manual check
window.test.a === window.test2.a && window.test.b === window.test2.b && window.test.c === window.test2.c && window.test.d === window.test2.d

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
flat isEqual
manual check

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested.

**Benchmark Definition**

The benchmark definition represents a test case that compares two objects: `window.test` and `window.test1`. The purpose of this test is to measure the performance of comparing two identical objects using Lodash's `isEqual` function. The test also includes a manual check, where it compares each property individually.

**Options Compared**

In this benchmark, we have two options being compared:

1. **Lodash's `isEqual` function**: This function takes two arguments and returns a boolean indicating whether the two objects are equal.
2. **Manual comparison**: This involves comparing each property of the two objects individually using the `===` operator.

**Pros and Cons**

* **Lodash's `isEqual` function**:
	+ Pros: Efficient, concise, and handles complex object structures.
	+ Cons: May have a slight performance overhead due to its implementation.
* **Manual comparison**:
	+ Pros: Low overhead, easy to understand, and can be optimized for specific use cases.
	+ Cons: Can be verbose, prone to errors if not implemented correctly, and may not handle complex object structures.

In general, Lodash's `isEqual` function is a good choice when you need to compare two objects with complex structures. However, for simple cases or performance-critical code, manual comparison might be a better option.

**Library and its purpose**

The Lodash library provides a set of utility functions that can simplify common tasks in JavaScript development. In this benchmark, Lodash's `isEqual` function is used to compare two objects efficiently.

**Special JS feature or syntax**

There are no special features or syntax mentioned in the benchmark definition. The code uses standard JavaScript features and syntax.

**Other alternatives**

If you don't want to use Lodash's `isEqual` function, you can implement a custom comparison function using the following approaches:

1. Use the `Object.keys()` method to iterate over the properties of an object.
2. Use the `for...in` loop to iterate over the properties of an object.

Here's an example implementation:
```javascript
function compareObjects(obj1, obj2) {
  for (var key in obj1) {
    if (obj1[key] !== obj2[key]) return false;
  }
  return true;
}
```
Keep in mind that this implementation has a higher overhead compared to Lodash's `isEqual` function.

It's worth noting that MeasureThat.net provides a variety of benchmarks for different JavaScript engines and platforms. If you're interested in comparing the performance of different approaches or testing other libraries, you can explore their benchmarking platform further.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36

Browser/OS: Chrome 78 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
flat isEqual	1580212.8 Ops/sec
manual check	1032360.2 Ops/sec

Related benchmarks:

Lodash isEqual test fffw (version: 0)

Test on isEqual performance

Comparing performance of: flat isEqual vs manual check

Created: 4 years ago by: Guest

Jump to the latest result

flat isEqual

manual check

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):