Benchmark: new attr vs update attr

HTML Preparation code:

<div id="foo" aria-label=""></div>

Tests:

add new attr
const element = document.getElementById("foo"); element.setAttribute('tabindex', '0');
update attr
const element = document.getElementById("foo"); element.setAttribute('aria-label', 'test');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
add new attr
update attr

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:133.0) Gecko/20100101 Firefox/133.0

Browser/OS: Firefox 133 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
add new attr	3113367.0 Ops/sec
update attr	2351972.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is defined in JSON format, which includes:

* `Name`: The name of the benchmark, "new attr vs update attr".
* `Description`: An empty string, indicating that no detailed description is provided.
* `Script Preparation Code` and `Html Preparation Code`: These are used to prepare the test environment. In this case, they're empty, suggesting that the script already has a reference to an HTML element with ID "foo".

The benchmark compares two approaches:

1. **"add new attr"`**: This approach sets a new attribute on the existing element using `element.setAttribute('tabindex', '0');`.
2. **"update attr"`**: This approach updates an existing attribute on the element using `element.setAttribute('aria-label', 'test');`.

**Options compared**

The two options being compared are:

* Creating a new attribute vs updating an existing one.
* The implications of each approach on performance, memory usage, and potential browser behavior.

**Pros and Cons**

* **Creating a new attribute**:
	+ Pros: Can be faster if the element doesn't already have the required attribute.
	+ Cons: May require more memory allocation or parsing if the attribute is not present.
* **Updating an existing attribute**:
	+ Pros: Reuses memory and reduces parsing overhead if the attribute is already present.
	+ Cons: May be slower due to additional processing if the attribute doesn't exist.

**Library usage**

The `setAttribute()` method is a built-in JavaScript function, so no library is required. This method updates the specified attribute of an element by setting its value to the specified value.

**Special JS features or syntax**

There are none mentioned in this benchmark definition.

**Other considerations**

* The test environment uses Chrome 100 on a desktop platform with Mac OS X 10.15.7.
* The benchmark runs multiple executions per second, suggesting that performance is the primary focus.
* The results will likely provide insight into the relative performance of each approach across different browsers and platforms.

**Alternative approaches**

Other alternatives to consider when updating attributes include:

* Using a library like jQuery to simplify attribute manipulation
* Optimizing attribute updates by using a single operation to update multiple attributes
* Using a more efficient data structure, such as a hash table, to store attribute values

Keep in mind that these alternatives may not be applicable or desirable in all situations, and the results of this benchmark should be considered in context with specific requirements and constraints.

Related benchmarks:

new attr vs update attr (version: 0)

Comparing performance of: add new attr vs update attr

Created: 4 years ago by: Guest

Jump to the latest result

add new attr

update attr

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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