Benchmark: Change object value vs add class

HTML Preparation code:

<div class="change" id="hasClass"></div>
<div class="" id="hasNoClass"></div>

Script Preparation code:

var object = {a: false};
var hasClass = document.getElementById('hasClass').classList;
var hasNoClass = document.getElementById('hasNoClass').classList;

Tests:

Change object value
object.a = true;
Change class when it has a class
hasClass.remove('change');
Change class when it has no class
hasNoClass.remove('change');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Change object value
Change class when it has a class
Change class when it has no class

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 break down the provided JSON data and explain what's being tested, compared, and analyzed.

**Benchmark Definition**

The benchmark is designed to compare two approaches:

1. **Changing an object value**: In this approach, an object is created with an initial value of `false`. The test script then sets the value of `a` to `true`.
2. **Adding or removing a class**: In this approach, two HTML elements are created: one with and one without a CSS class named "change". The test script attempts to remove the "change" class from both elements.

**Options Compared**

The benchmark compares the performance differences between these two approaches:

* Changing an object value (approach 1)
* Adding or removing a class (approach 2)

**Pros and Cons of Different Approaches**

**Approach 1: Changing an Object Value**

Pros:

* Typically faster, as it only requires updating a single property
* Less memory allocation and garbage collection overhead

Cons:

* May be less intuitive for developers familiar with DOM manipulation

**Approach 2: Adding or Removing a Class**

Pros:

* More intuitive for developers familiar with CSS and class manipulation
* Can be more flexible, as classes can be reused across multiple elements

Cons:

* Typically slower, as it requires updating the `classList` property of an element
* May incur additional memory allocation and garbage collection overhead

**Library Usage (none)**

There is no explicit library usage in this benchmark.

**Special JS Feature/Syntax**

None mentioned.

**Other Alternatives**

Alternative approaches to consider:

* Using a different data structure, such as an array or a custom object, instead of an object with a single property.
* Using a different method for updating the value (e.g., using `delete` instead of assignment).
* Adding additional tests to compare performance differences between multiple browsers or devices.

In summary, this benchmark compares two approaches to updating values: changing an object property versus adding or removing a class. The results will help identify which approach is faster and more efficient for specific use cases.

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser/OS: Chrome 60 on Mac OS X 10.12.3

View result in a separate tab

Test name	Executions per second
Change object value	12471300.0 Ops/sec
Change class when it has a class	2674151.0 Ops/sec
Change class when it has no class	2724797.2 Ops/sec

Related benchmarks:

Change object value vs add class (version: 0)

Comparing performance of: Change object value vs Change class when it has a class vs Change class when it has no class

Created: 7 years ago by: Guest

Jump to the latest result

Change object value

Change class when it has a class

Change class when it has no class

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):