Benchmark: Empty div methods

HTML Preparation code:


<div id='parent'>
  <li>home</li>
    <li>one</li>
    <li>two</li>
    <li>three</li>
    <li>four</li>
    <li>five</li>
    <li>six</li>
    <li>seven</li>
    <li>eight</li>
</div>

Script Preparation code:

var parent = document.getElementById('parent');

Tests:

removeChild (while firstChild)
while (parent.firstChild) { parent.removeChild(parent.lastChild) }
innerHTML
parent.innerHTML = ""
replaceChildren
parent.replaceChildren()
removeChild (while lastChild)
while (parent.lastChild) { parent.removeChild(parent.lastChild); }
remove() while loop
while (parent.firstChild) { parent.firstChild.remove(); }
remove() forEach loop
[...parent.childNodes].forEach(el => el.remove())

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
removeChild (while firstChild)
innerHTML
replaceChildren
removeChild (while lastChild)
remove() while loop
remove() forEach loop

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 dive into the details of the benchmark.

**What is being tested?**

The provided JSON represents a set of JavaScript microbenchmarks that test various methods for removing child nodes from a DOM element, specifically an empty `<div>` with multiple `<li>` elements. The benchmarks are designed to measure the performance of different approaches to remove these nodes efficiently.

**Options compared**

The benchmark compares six different methods:

1. `removeChild` with a while loop (`while (parent.firstChild) { ... }`)
2. `innerHTML` set to an empty string (`parent.innerHTML = ""`)
3. `replaceChildren()`
4. `remove()` method with a while loop (`while (parent.lastChild) { ... }`)
5. `forEach` loop with the `remove()` method (`[...parent.childNodes].forEach(el => el.remove())`)
6. `remove()` method with a while loop on the last child node (`while (parent.lastChild) { ... }`)

**Pros and Cons of each approach**

1. **`removeChild` with a while loop**: This method is straightforward but may be slow due to the overhead of repeatedly checking for the first child node.
2. **`innerHTML` set to an empty string**: This method directly updates the DOM, which can be efficient but may not be suitable for all use cases.
3. **`replaceChildren()`**: This method replaces all child nodes with a new set, which is more efficient than removing individual nodes.
4. **`remove()` method with a while loop on last child node**: Similar to the previous point, this method can be slow due to repeated checks.
5. **`forEach` loop with `remove()` method**: This approach uses an iterator to remove all child nodes, which is generally efficient but may have some overhead due to the use of an iterator.
6. **`remove()` method with a while loop on first child node**: Similar to the previous point, this method can be slow due to repeated checks.

**Special considerations**

The benchmark does not appear to include any special JavaScript features or syntax that would affect its behavior.

**Other alternatives**

There may be other approaches to removing child nodes from a DOM element that are not included in this benchmark. Some alternative methods could include:

* Using the `DOMMutationObserver` API
* Creating a new container element and appending it to the original element
* Using a library or framework-specific method (e.g., React's `removeChild` function)

Keep in mind that these alternatives may have different trade-offs in terms of performance, readability, and compatibility.

Related benchmarks:

Empty div methods (version: 0)

Comparing performance of: removeChild (while firstChild) vs innerHTML vs replaceChildren vs removeChild (while lastChild) vs remove() while loop vs remove() forEach loop

Created: 3 years ago by: Registered User

Jump to the latest result

removeChild (while firstChild)

innerHTML

replaceChildren

removeChild (while lastChild)

remove() while loop

remove() forEach loop

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):