Benchmark: getAttribute vs dataset (for loop 1K)

HTML Preparation code:

<div id="foo" data-foo="foo_id"></div>

Script Preparation code:

const element = document.getElementById("foo");

Tests:

getAttribute
let value; for (let i = 0; i < 1000; ++i) { value = element.getAttribute("data-foo"); }
dataset
let value; for (let i = 0; i < 1000; ++i) { value = element.dataset.foo; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getAttribute
dataset

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 10 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 OPR/119.0.0.0

Browser/OS: Opera 119 on Windows

View result in a separate tab

Test name	Executions per second
getAttribute	24924.1 Ops/sec
dataset	12983.2 Ops/sec

Autogenerated LLM Summary (model gpt-4o-mini, generated 10 months ago):

LLMs can make mistakes. Check important info.

### Benchmark Overview

The benchmark titled **"getAttribute vs dataset (for loop 1K)"** compares two methods of accessing HTML element data attributes in JavaScript: `getAttribute` and the `dataset` property.

#### **Comparative Methods**

1. **getAttribute**
   - **Usage:** Access a data attribute by retrieving the raw attribute via its name.
   - **Code Snippet:**
     ```javascript
     let value;
     for (let i = 0; i < 1000; ++i) {
       value = element.getAttribute("data-foo");
     }
     ```

2. **dataset**
   - **Usage:** Access a data attribute using the `dataset` property, which allows for more straightforward access to data attributes by their camel-cased names.
   - **Code Snippet:**
     ```javascript
     let value;
     for (let i = 0; i < 1000; ++i) {
       value = element.dataset.foo;
     }
     ```

### **Pros and Cons**

#### **getAttribute**
- **Pros:**
  - Permits access to any attribute directly by its string name (e.g., can be used for non-data attributes).
  - Useful for dynamic or dynamic attribute names.

- **Cons:**
  - Generally slower than `dataset` for data attributes due to additional processing overhead.
  - Requires knowledge of the exact attribute name in the HTML.

#### **dataset**
- **Pros:**
  - Simplifies access to data attributes, allowing developers to use a more natural and readable syntax.
  - Automatically handles camel casing (e.g., `data-my-attribute` is accessed as `element.dataset.myAttribute`).

- **Cons:**
  - Limited only to data attributes and cannot be used for arbitrary attributes.
  - Not suitable for attributes that do not follow the `data-*` naming convention.

### **Benchmark Results**

The benchmark results indicate the number of executions per second for each method on a specified environment (Windows OS, Opera 119 browser):

- **getAttribute**
  - **Executions Per Second:** 24,924
- **dataset**
  - **Executions Per Second:** 12,983

From the results, `getAttribute` performs significantly better than `dataset` in this particular case, nearly doubling its execution speed.

### **Considerations**

- **Browser and Environment:** The results might differ across multiple browsers or environments due to variations in JavaScript engines and DOM handling. This benchmark was conducted on the Opera browser, which runs on the Blink engine, similar to Chrome.
- **Execution Context:** Performance can also differ based on how the HTML elements are structured and the complexity of each method's use case.
- **Looping Context:** Since this test runs 1000 iterations, it tests the repeatability of each attribute retrieval method, making it critical to understand that the proportions observed may shift with fewer or greater iterations.

### **Alternatives**

Developers have alternative approaches to retrieve attribute values, such as:

- **Direct Property Access:** For static values that do not change, developers can directly access element properties.
- **jQuery or other Libraries:** Some developers might use libraries like jQuery that offer a wrapper around raw DOM methods, abstracting them for ease of use but typically at a performance cost compared to native methods.

### Conclusion

This benchmark succinctly reveals that while the `dataset` method offers a more elegant and readable syntax for accessing data attributes, `getAttribute` is significantly faster. Choosing between these two methods should weigh performance needs against code clarity, educational backgrounds, and specific applications in dynamic versus static content.

Related benchmarks:

getAttribute vs dataset (for loop 1K) (version: 1)

Compare getAttribute with dataset

Comparing performance of: getAttribute vs dataset

Created: 10 months ago by: Guest

Jump to the latest result

getAttribute

dataset

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gpt-4o-mini, generated 10 months ago):