Benchmark: affafaf - MeasureThat.net

HTML Preparation code:

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

Script Preparation code:

window.foo = {
            firstName: "Elon",
            lastName: "Musk",
            age: 25,
            address: {
                id: 1,
                country: "UK"
            }
        };;
window.bar = {
            firstName: "Elon",
            lastName: "Musk",
            age: 25,
            address: {
                id: 1,
                country: "UK"
            }
        };;

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: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser/OS: Firefox 110 on Windows

View result in a separate tab

Test name	Executions per second
_.isEqual	542496.7 Ops/sec
JSON.stringify	643415.9 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition JSON**

The `Script Preparation Code` section defines two JavaScript objects, `window.foo` and `window.bar`, which contain similar properties but with different values. Specifically:

* Both objects have `firstName`, `lastName`, and `age` properties with the same values.
* However, `window.foo` has an additional property called `address` with a nested object containing `id` and `country` properties, while `window.bar` does not have this nested address object.

The `Html Preparation Code` section includes a reference to the Lodash library, which provides the `_isEqual` function used in one of the benchmark definitions.

**Individual Test Cases**

There are two test cases:

1. **_.isEqual(window.foo, window.bar)**: This test case measures the performance of the `_isEqual` function from Lodash, which is used to compare two objects for equality.
	* The `window.foo` and `window.bar` objects have similar properties but with different values (the nested address object in `window.foo`). This suggests that the test case is testing whether the `_isEqual` function can correctly handle nested objects with differing properties.
2. **JSON.stringify(window.foo) === JSON.stringify(window.bar)**: This test case measures the performance of converting a JavaScript object to a string using `JSON.stringify` and comparing it with another identical string representation.
	* The difference between this test case and the previous one lies in that the second test case is comparing the string representations of the objects, whereas the first test case compares the objects themselves. This implies that the performance difference may be due to the overhead of calling a function ( `_isEqual` ) versus simply converting an object to a string.

**Options Compared**

In this benchmark, two different approaches are being compared:

1. **_isEqual(window.foo, window.bar)**: This approach uses the Lodash library's `_isEqual` function to compare the objects.
2. **JSON.stringify(window.foo) === JSON.stringify(window.bar)**: This approach converts both objects to string representations and compares them using the `===` operator.

**Pros and Cons**

Here are some pros and cons of each approach:

* **_isEqual(window.foo, window.bar)**:
	+ Pros:
		- More accurate comparison, as it takes into account all properties (including nested ones) of both objects.
		- Less prone to false positives due to differences in object representation.
	+ Cons:
		- May be slower due to the overhead of calling a function and comparing its results.
		- Requires the Lodash library, which may add additional dependencies.
* **JSON.stringify(window.foo) === JSON.stringify(window.bar)**:
	+ Pros:
		- Faster, as it involves simple string comparisons rather than object comparison functions.
		- Does not require any external libraries (other than `JSON`).
	+ Cons:
		- May produce false positives due to differences in object representation or formatting.
		- Not suitable for cases where object properties have different types or values.

**Other Considerations**

* In terms of performance, the benchmark measures executions per second, which indicates how many times each test case can be executed within a given time frame. This suggests that the goal is to determine which approach is faster and more reliable.
* The use of Lodash's `_isEqual` function implies that the benchmark creator wants to ensure accurate comparisons, even when dealing with complex objects or nested properties.

**Alternatives**

Other alternatives for comparing objects in JavaScript could include:

* Using a custom implementation of object comparison (e.g., by iterating over each property and checking for equality).
* Utilizing other libraries or frameworks that provide object comparison functionality (e.g., `lodash-eq`, `moment.js`, etc.).
* Implementing a more advanced comparison algorithm, such as recursively comparing nested objects.

However, without further context or specific requirements, the use of Lodash's `_isEqual` function and the chosen benchmark definitions remain the best approaches for this particular test case.

Related benchmarks:

affafaf (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: one year 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):