Benchmark: Closest vs Loop vs Recursion

HTML Preparation code:

<div class="parent">
  <div class="child">
    <div class="child">
      <div class="child child-last"></div>
    </div>
  </div>
</div>

Script Preparation code:

window.isParent = function(el) {
  return el.classList.contains('parent');
}

window.findParent = function(el) {
  if (isParent(el)) return el
  if (!el.parentNode) return false
  return findParent(el.parentNode)
}
   
Benchmark.prototype.setup = function() {
  var element = document.getElementsByClassName('child-last')[0];
};

Tests:

Closest
element = element.closest('.parent')
Loop
while (element) { if (isParent(element)) break; if (!element.parentNode) break; element = element.parentNode; }
Recursion
element = findParent(element)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Closest
Loop
Recursion

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.

**Benchmark Overview**

The provided benchmark compares three approaches to find the parent element of an HTML child element: `Closest`, `Loop`, and `Recursion`. The test case uses JavaScript and utilizes a custom library called `findParent` (explained later).

**Options Comparison**

1. **Closest**: This approach uses the `closest()` method provided by modern browsers, which traverses up the DOM tree in search of an element that matches the specified selector.
	* Pros: Efficient, widely supported, and fast.
	* Cons: May not work for older browsers or specific edge cases.
2. **Loop**: This approach iterates through the DOM tree using a while loop to find the parent element.
	* Pros: Works in all browsers, including older ones, but may be slower due to the overhead of iteration.
	* Cons: More complex and error-prone than `Closest`.
3. **Recursion**: This approach calls the `findParent` function recursively until it finds a matching parent element.
	* Pros: Simple and easy to implement, works in all browsers.
	* Cons: May be slower due to recursion overhead, and can cause stack overflow errors for deep DOM trees.

**Custom Library - findParent**

The `findParent` library is used by the Recursion test case. It provides a simple function to find the parent element of an HTML element using iteration. The implementation is:
```javascript
window.findParent = function(el) {
  if (isParent(el)) return el;
  if (!el.parentNode) return false;
  return findParent(el.parentNode);
};
```
The `isParent` function checks if the provided element is a parent of another element by checking its class list.

**Special JS Feature - no special features are mentioned**

**Other Alternatives**

In addition to these three approaches, other alternatives could include:

* Using the `parentNode` property directly: `element.parentNode`
* Using a library like jQuery's `.parent()` method
* Using a more complex approach involving regular expressions or DOM traversal APIs

However, these alternatives may not be as efficient or widely supported as the `Closest`, `Loop`, and `Recursion` approaches.

Related benchmarks:

Closest vs Loop vs Recursion (version: 0)

Comparing performance of: Closest vs Loop vs Recursion

Created: 3 years ago by: Guest

Jump to the latest result

Closest

Loop

Recursion

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):