Benchmark: remove vs display:none on each element2

HTML Preparation code:

<div id="container"></div>

Script Preparation code:

var container = document.getElementById('container');
ul = document.createElement('ul');
var html = [];
    for ( var i=0; i<200000; i += 1 ) {
  	html.push(`<li>${i}</li>`);
}
 ul.innerHTML = html.join('');
 container.appendChild(ul);

Tests:

removeChild
var element = ul.firstElementChild; while (element) { var element = ul.firstElementChild; element && ul.removeChild(element); }
display:none on each element
var elements = Array.prototype.slice.call(container); for (var i = 0; i < elements.length; i++) { elements[i].style.display = "none"; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
removeChild
display:none on each element

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested, compared, and considered in this JavaScript microbenchmark.

**Benchmark Overview**

The benchmark consists of two individual test cases: `removeChild` and `display:none on each element`. Both tests aim to measure the performance difference between removing elements from an HTML list using different approaches.

**Test Case 1: removeChild**

This test case uses the `ul.firstElementChild` property, which returns the first child element of the `ul` element. The benchmark then enters a loop where it recursively calls `ul.removeChild(element)` until the element is removed.

Here's a breakdown of what's being tested:

* Performance of removing elements from an HTML list using the `firstElementChild` property
* How often this approach can be executed in a second per test case

**Pros and Cons**

Using `firstElementChild` has some advantages:

* It allows for efficient removal of elements, as it skips over child nodes that are not directly under the current element.
* However, it's less common and might require additional setup or handling in certain cases.

On the other hand, this approach can be considered less intuitive and more complex to understand compared to a straightforward `removeChild` method call.

**Test Case 2: display:none on each element**

This test case uses `Array.prototype.slice.call(container)` to get an array of elements from the container element, and then loops through the array, setting `display` to `'none'` for each element.

Here's a breakdown of what's being tested:

* Performance of applying CSS styles (`display:none`) to multiple elements using an array
* How often this approach can be executed in a second per test case

**Pros and Cons**

Using a loop with `Array.prototype.slice.call(container)` has some advantages:

* It allows for easy iteration over all elements, as it provides a clear understanding of the process.
* However, it's generally slower than removing individual elements, especially for large arrays.

On the other hand, this approach can be considered more verbose and less efficient compared to a straightforward `removeChild` method call.

**Library Usage**

In both test cases, no libraries are explicitly mentioned. However, `Array.prototype.slice.call(container)` uses the `slice` method from the Array prototype, which is a built-in JavaScript feature.

No additional libraries are required for these tests.

**Special JS Feature or Syntax**

There's no special JavaScript feature or syntax used in these tests beyond what's considered standard in modern JavaScript. However, note that using `ul.firstElementChild` requires support for this property, which might not be present in older browsers.

**Alternatives**

Other alternatives to measure the performance of removing elements from an HTML list could include:

* Using a more efficient data structure, such as a linked list or a deque
* Implementing a custom removal loop that avoids unnecessary DOM operations
* Using Web Workers to parallelize the test and reduce contention

Keep in mind that these alternatives would likely require significant changes to the benchmark code and might not be relevant depending on the specific requirements of the project.

Related benchmarks:

remove vs display:none on each element2 (version: 0)

Comparing performance of: removeChild vs display:none on each element

Created: 2 years ago by: Guest

Jump to the latest result

removeChild

display:none on each element

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):