Benchmark: isEqual vs stringify returns false

HTML Preparation code:

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

Script Preparation code:

window.foo = {
  name: 'Ram',
  age: 20,
  location: {
    city: 'N',
    state: 'NY'
  }
};
window.bar = {
  name: 'Ram',
  age: 20,
  location: {
    city: 'NY',
    state: 'NY'
  }
};

Tests:

isEqual
_.isEqual(window.foo, window.bar)
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
stringify

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided benchmark.

**What is being tested?**

The benchmark tests two different approaches to compare two JavaScript objects: `_.isEqual` from the Lodash library and the simple equality check using the `===` operator with `JSON.stringify()`.

**Options compared:**

* `_ _.isEqual(window.foo, window.bar)`: This option uses the `_.isEqual` function from Lodash to compare the two objects. The function checks for deep equality between the objects, meaning it will recursively traverse both objects and their properties to determine if they are equal.
* `JSON.stringify(window.foo) === JSON.stringify(window.bar)`: This option uses the `===` operator to compare the stringified versions of the two objects. Stringification converts an object into a JSON-formatted string, which can be compared for equality.

**Pros and Cons:**

* `_ _.isEqual`:
	+ Pros:
		- More accurate comparison, especially for complex objects with nested properties.
		- Less prone to false positives or negatives due to the deep equality check.
	+ Cons:
		- Requires the Lodash library, which may add overhead to the benchmark.
		- Can be slower due to the recursive nature of the comparison.
* `JSON.stringify`:
	+ Pros:
		- Faster and more lightweight, as it only needs to convert the object to a string.
		- Does not require any external libraries.
	+ Cons:
		- May produce false positives or negatives if the objects have different structure or property names.
		- Can be sensitive to the order of properties in the objects.

**Library:**

* `lodash`: A popular JavaScript utility library that provides a wide range of functions for tasks such as string manipulation, array and object manipulation, and more. In this benchmark, `_.isEqual` is used to compare the two objects.

**Special JS feature or syntax:**

There are no special JS features or syntax mentioned in this benchmark. However, it's worth noting that Lodash uses a technique called "short-circuit evaluation" for its functions, which can affect performance in some cases.

**Other alternatives:**

* For comparing objects, you could also use the `===` operator without stringification: `window.foo === window.bar`. This would be even faster than using `JSON.stringify`.
* If you want to compare objects without relying on the `===` operator or Lodash, you could implement a custom equality check function using a recursive approach.

Keep in mind that the choice of comparison method depends on your specific use case and requirements.

Related benchmarks:

isEqual vs stringify returns false (version: 0)

Comparing performance of: isEqual vs stringify

Created: 5 years ago by: Guest

Jump to the latest result

isEqual

stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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