Benchmark: Settings attributes as list

Tests:

With className
let element = document.createElement('div'); let attributes = { class: 'class1 test--class2', width: '600px', height: '400px' }; for (let attribute in attributes) { if (attributes[attribute] === 'class') { element.className = attribute; } else element.setAttribute(attribute, attributes[attribute]); }
Without className
let element = document.createElement('div'); let attributes = { class: 'class1 test--class2', width: '600px', height: '400px' }; for (let attribute in attributes) { element.setAttribute(attribute, attributes[attribute]); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
With className
Without className

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 is being tested.

**Benchmark Definition**

The benchmark is designed to test the performance difference between using `className` and `setAttribute` to set attributes on an HTML element. The goal is to determine whether the overhead of setting a class attribute using `className` affects the overall performance of the code.

**Options Compared**

Two options are being compared:

1. **Without className**: This option uses the `setAttribute` method to set all attributes, without using the `className` attribute.
2. **With className**: This option uses both `setAttribute` and `className` to set attributes. Specifically, it checks if the value is equal to `'class'` and sets the corresponding class name using `className`. Otherwise, it sets the attribute using `setAttribute`.

**Pros and Cons of Different Approaches**

Using `className` can be beneficial in certain situations:

*   It allows for more flexibility in setting classes on an element.
*   It can improve performance by avoiding the overhead of parsing a string.

However, it also has some drawbacks:

*   It may not work correctly when setting non-class attributes (e.g., width and height).
*   It requires explicit checks to handle certain cases.

On the other hand, using `setAttribute` provides more control over attribute settings:

*   It allows for setting any type of attribute.
*   It avoids the need for explicit checks.

However, it also has some limitations:

*   It may not be as efficient as using `className` in certain situations.
*   It requires manual handling of attribute values.

**Library Used**

In this benchmark, there is no library explicitly used. The script only uses native JavaScript features to test the performance difference between two approaches.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax mentioned in the provided data. However, it's worth noting that some modern browsers have introduced new features like `classList` and `getAttribute()` methods that might affect the outcome of this benchmark.

**Other Alternatives**

To test similar performance differences, other alternatives could include:

*   **Using `data-` attributes**: Instead of using class names, consider using `data-` attributes to store metadata. This approach can be more efficient in certain situations.
*   **Using a library like jQuery**: While not explicitly used in this benchmark, libraries like jQuery provide an alternative way of setting attributes and handling DOM manipulations.
*   **Testing different attribute values**: Consider testing with different types of attribute values (e.g., strings, numbers, booleans) to see how the performance difference holds up.

Keep in mind that these alternatives might not be directly applicable to this specific benchmark, but they could provide a starting point for exploring similar performance-related topics.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Browser/OS: Chrome 74 on Windows

View result in a separate tab

Test name	Executions per second
With className	309120.9 Ops/sec
Without className	315859.9 Ops/sec

Related benchmarks:

Settings attributes as list (version: 0)

Testing whether an if/else statement slows down the speed difference between setAttribute and className

Comparing performance of: With className vs Without className

Created: 5 years ago by: Guest

Jump to the latest result

With className

Without className

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):