Benchmark: Setattribute vs setAttribute with attribute already set

HTML Preparation code:

<div class="withoutAttribute"></div>
<div class="withAttribute" data-bgcolor></div>

Tests:

attribute already set
document.querySelector('.withAttribute').setAttribute('data-bgcolor', 'blue');
attribute not set
document.querySelector('.withoutAttribute').setAttribute('data-bgcolor', 'red');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
attribute already set
attribute not set

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 data to understand what is being tested on MeasureThat.net.

**Benchmark Definition**

The benchmark definition specifies that two JavaScript microbenchmarks are being compared:

1. `Setattribute` (with a camelCase "a") vs `setAttribute` with attribute already set
2. `Attribute not set`

These benchmarks measure the performance difference between two approaches to setting an attribute on an HTML element using JavaScript.

**Options Compared**

Two options are being compared:

A) Using `Setattribute` (with a camelCase "a") - This is likely referring to the `setAttribute()` method with a lowercase "s" and without quotes.
B) Setting the attribute already present on the element using `setAttribute`.

**Pros and Cons of Each Approach:**

A) **Setattribute**: This approach might be faster if:

* The browser has an optimized implementation for this specific use case.
* The JavaScript engine can directly access the existing attribute value, reducing overhead.

However, using camelCase "a" in JavaScript is not conventional. It's possible that some browsers or engines might interpret it differently than `setAttribute`.

B) **Attribute already set**: This approach ensures that the attribute is being set with an existing value, which might be more relevant in certain scenarios, such as:

* When working with third-party libraries that expect a specific attribute format.
* In cases where a specific attribute needs to be preserved or updated.

However, this approach may introduce additional overhead due to the potential need for string manipulation or lookup.

**Library and Purpose**

There is no explicitly mentioned library in the provided JSON data. However, if we consider `setAttribute` method, it's part of the DOM API (Document Object Model) which is a standard JavaScript interface for interacting with HTML elements.

**Special JS Feature or Syntax**

The use of camelCase "a" instead of lowercase "s" and quotes might be seen as an unconventional syntax in JavaScript. This notation is not explicitly mentioned in ECMAScript standards, but it's possible that some browsers or engines have optimized implementations that support this notation.

**Other Alternatives**

If you want to test similar benchmarks, here are a few alternatives:

1. Set attribute using bracket notation (e.g., `document.querySelector('.withAttribute')['data-bgcolor'] = 'blue';`)
2. Use the `dataset` property (if supported by your target browsers) instead of `setAttribute`
3. Compare performance of setting attributes using different methods, such as `style`, `innerHTML`, or other approaches.

In conclusion, this benchmark measures the performance difference between two approaches to setting an attribute on an HTML element: using `Setattribute` with camelCase "a" vs `setAttribute` with an existing value already set. The results are likely to provide insights into how different browsers and engines optimize their implementations for these specific use cases.

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Linux

View result in a separate tab

Test name	Executions per second
attribute already set	3517905.5 Ops/sec
attribute not set	3401657.8 Ops/sec

Related benchmarks:

Setattribute vs setAttribute with attribute already set (version: 0)

Comparing performance of: attribute already set vs attribute not set

Created: 3 months ago by: Guest

Jump to the latest result

attribute already set

attribute not set

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):