Benchmark: getAttribute vs get property (.)

Script Preparation code:

var anchor = document.createElement("a");
anchor.href = "https://localhost/";
var input = document.createElement("input");
input.value = "Hello! 🥺";

Tests:

<a> setAttribute
console.log(anchor.getAttribute("href"));
<a> assignment (=)
console.log(anchor.href);
<input> assignment (=)
console.log(input.value);
<input> setAttribute
console.log(input.getAttribute("value"));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
<a> setAttribute
<a> assignment (=)
<input> assignment (=)
<input> setAttribute

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 benchmark and its test cases to understand what is being tested.

**Benchmark Definition**

The benchmark measures the performance difference between using `getAttribute()` and the dot notation (`.`) for accessing property values in JavaScript, specifically when working with DOM elements.

**Options Compared**

Two options are compared:

1. **`getAttribute()`:** This method retrieves the value of a named attribute from an element.
2. **Dot Notation (`.`):** This is a shorthand way to access a property or method of an object using dot notation, e.g., `anchor.href`.

**Pros and Cons**

Using `getAttribute()`:

* Pros:
	+ Unambiguously retrieves the value of a named attribute from an element.
	+ Works for any type of attribute (e.g., `href`, `src`, etc.).
* Cons:
	+ May be slower due to the overhead of parsing the DOM and looking up the attribute name.

Using Dot Notation (`.`):

* Pros:
	+ Faster, as it directly accesses the property without parsing the DOM.
	+ More concise and readable in many cases.
* Cons:
	+ May lead to errors if the property doesn't exist or if the syntax is incorrect.
	+ Only works for accessing property values, not attributes.

**Library**

There is no explicit library mentioned in the benchmark definition. However, it's likely that the `document` object and its methods are being used to interact with the DOM.

**Special JS Feature/Syntax**

None of the test cases use special JavaScript features or syntax. The focus is on comparing two common methods for accessing property values.

**Benchmark Preparation Code**

The script preparation code creates a new `<a>` element (`anchor`) and an input element (`input`), sets their attributes and values, and then defines the benchmark test cases in the `console.log()` statements.

**Individual Test Cases**

Each test case compares one of two methods:

1. `<a> setAttribute`: Compares accessing the `href` attribute using `getAttribute()`.
2. `<a> assignment (=)`: Compares assigning a value to the `href` property directly.
3. `<input> assignment (=)`: Compares setting the `value` property of the input element directly.

**Alternatives**

Other alternatives for accessing property values or attributes include:

* Using the bracket notation (`[]`) instead of dot notation: `anchor['href']`.
* Using the `in` operator to check if a property exists before trying to access it.
* Using the `hasOwnProperty()` method on objects to check if a property is owned by that object.

Keep in mind that these alternatives may have different performance characteristics or use cases compared to using `getAttribute()`, dot notation, or bracket notation.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/114.0

Browser/OS: Firefox 114 on Windows

View result in a separate tab

Test name	Executions per second
<a> setAttribute	62949.5 Ops/sec
<a> assignment (=)	48324.7 Ops/sec
<input> assignment (=)	56562.9 Ops/sec
<input> setAttribute	65412.1 Ops/sec

Related benchmarks:

getAttribute vs get property (.) (version: 0)

getAttribute vs get property (.)

Comparing performance of: <a> setAttribute vs <a> assignment (=) vs <input> assignment (=) vs <input> setAttribute

Created: one year ago by: Guest

Jump to the latest result

<a> setAttribute

<a> assignment (=)

<input> assignment (=)

<input> setAttribute

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):