Benchmark: element.getAttribute("name") vs element.attributes.name.value

HTML Preparation code:

<div>
  <div id="test" someattr="val"></div>
</div>

Tests:

element.getAttribute("name")
!!(document.getElementById("test").getAttribute("someattr"))
element.attributes.name.value
!!(document.getElementById("test").attributes.someattr.value)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
element.getAttribute("name")
element.attributes.name.value

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 138 on Android

View result in a separate tab

Test name	Executions per second
element.getAttribute("name")	11139710.0 Ops/sec
element.attributes.name.value	5009734.0 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 JSON and explain what's being tested.

**Benchmark Definition**

The benchmark is testing two approaches to access an attribute value from an HTML element:

1. `element.getAttribute("name")`
2. `element.attributes.name.value`

These are two different ways to retrieve the value of the "name" attribute from an HTML element with the id "test".

**Options Compared**

We have two options being compared:

* `element.getAttribute("name")`: This method uses the `getAttribute` method on the element object, which returns the value of a specific attribute. The return type is always a string.
* `element.attributes.name.value`: This method accesses the `name` property of the `attributes` object, which is a property of the element object that stores its attributes as a collection. The `.value` syntax is used to access the actual value associated with the "name" attribute.

**Pros and Cons**

* `element.getAttribute("name")`:
	+ Pros: This method is widely supported across browsers, and it's often the most straightforward way to get an attribute value.
	+ Cons: It can be slower than accessing the `attributes` object directly, as it involves a separate call to retrieve the attribute value from the element.
* `element.attributes.name.value`:
	+ Pros: This method is more efficient, as it accesses the attribute value directly without the overhead of an additional call. However, it requires support for the `.value` syntax on the `attributes` object, which may not be available in older browsers.
	+ Cons: This method can be less readable and less maintainable than using `getAttribute`, especially if you need to handle multiple attributes.

**Library**

In this benchmark, there is no explicit library mentioned. However, it's worth noting that some modern JavaScript engines (like SpiderMonkey) have optimized the `element.attributes` access pattern for performance-critical scenarios.

**Special JS Feature or Syntax**

There doesn't appear to be any special JavaScript feature or syntax being used in this benchmark. Both methods rely on standard JavaScript APIs.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

* Using `element.dataset` instead of `element.getAttribute` for accessing attribute values that start with the prefix "data-". This can be more efficient and readable.
* Using template literals or string interpolation to format strings instead of concatenation. This can be faster and more efficient in some cases.

Keep in mind that these alternatives may not directly address the specific performance difference between `element.getAttribute` and accessing the `attributes` object, but they can provide additional benefits in other areas.

I hope this explanation helps!

Related benchmarks:

element.getAttribute("name") vs element.attributes.name.value (version: 0)

Comparing performance of: element.getAttribute("name") vs element.attributes.name.value

Created: 5 years ago by: Registered User

Jump to the latest result

element.getAttribute("name")

element.attributes.name.value

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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