Benchmark: id vs getAttribute vs map

HTML Preparation code:

<button id="d0" class="data" data-test="lorem"><h3 id="d1">test dataset</h3></button>

Script Preparation code:

var typ = -1;
var acc = ''
var obj = {}
var simplehash = new Object();
simplehash[d0] = 'd0';
simplehash[d1] = 'd1';

document.onclick = (e) => {
  if (typ == 3) {
    acc += simplehash[e.target]
  } else if (typ == 2) {
    acc += e.getAttribute('test');
  } else {
    acc += e.target.id.slice(-1)
  }
}

Tests:

id
typ = 1; acc = ''; d0.click();
attr
typ = 2; acc = ''; d0.click();
map
typ = 3; acc = ''; d0.click();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
id
attr
map

Fastest: N/A

Slowest: N/A

Latest run results:

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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.

**Overview**

The benchmark is designed to compare three different approaches for extracting data from an HTML element:

1. `id`
2. `getAttribute` (accessing the `test` attribute)
3. `map` (using a mapping function)

Each test case uses a similar setup: a button with two IDs (`d0` and `d1`) and a class (`data`). The script preparation code initializes variables and sets up an event listener for a click event on the button.

**Options Compared**

The benchmark tests three options:

* `id`: Extracts the last character of the `id` attribute using string slicing (`e.target.id.slice(-1)`)
* `getAttribute`: Extracts the value of the `test` attribute using `getAttribute`
* `map`: Uses a mapping function to extract data from the element (not specified in the benchmark, but assumed to be related to the script preparation code)

**Pros and Cons**

Here are some pros and cons for each approach:

1. `id`:
	* Pros: Simple and efficient (uses string slicing)
	* Cons: May not work as expected if the `id` attribute is empty or contains non-alphanumeric characters
2. `getAttribute`:
	* Pros: Safe and reliable (accesses a specific attribute)
	* Cons: May be slower due to attribute access, and may require additional DOM traversal
3. `map`:
	* Pros: Flexibility and potential performance benefits
	* Cons: Requires more setup and understanding of the mapping function

**Library**

The benchmark uses the `simplehash` object from the JavaScript standard library (a plain object with string keys). The purpose of this object is to provide a simple way to store and retrieve data.

**Special JS Feature or Syntax**

There are no special features or syntax used in this benchmark. However, it's worth noting that using `document.onclick` instead of `e.target.onclick` is an older pattern, which has largely been replaced by modern event handling mechanisms like `addEventListener`.

**Alternatives**

Other alternatives for extracting data from HTML elements include:

* Using the `getAttribute` method with a `prefix` parameter to access nested attributes
* Using a CSS selector to select the desired element and extract its data
* Using a library like jQuery or React to handle DOM manipulation and event handling

Overall, this benchmark provides a basic comparison of three approaches for extracting data from HTML elements, highlighting the pros and cons of each method.

Related benchmarks:

id vs getAttribute vs map (version: 2)

Comparing performance of: id vs attr vs map

Created: 2 years ago by: Registered User

Jump to the latest result

id

attr

map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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