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remove lastChild vs replaceWith
(version: 0)
Comparing performance of:
remove lastChild vs replaceWith
Created:
4 years ago
by:
Guest
Go to the latest result
HTML Preparation code:
<div id="container"> <div>Content</div> <div>Content</div> <div>Content</div> </div>
Script Preparation code:
var container = document.getElementById('container');
Tests:
remove lastChild
while (container.lastChild) { container.lastChild.remove(); }
replaceWith
container.replaceWith();
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
remove lastChild
replaceWith
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
5 months ago
)
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:148.0) Gecko/20100101 Firefox/148.0
Browser/OS:
Firefox 148 on Linux
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Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=626343" width="100%" height="500px"></iframe>
remove lastChild
2105.5M/s
replaceWith
37.6M/s
View exact numbers
Test name
Executions per second
✓
remove lastChild
2,105,499,008 Ops/sec
replaceWith
37,569,100 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested, compared, and their pros and cons. **Benchmark Description:** The benchmark is designed to compare two approaches for removing child elements from a container element in JavaScript: 1. `remove lastChild`: This approach iterates through the container's children using a `while` loop, removing each child element until there are no more. 2. `replaceWith`: This approach uses the `replaceWith()` method to replace the entire content of the container with new elements. **Options Compared:** The benchmark is comparing these two approaches: 1. **Iterative removal (`remove lastChild`)**: * Pros: + Can be used when you need more control over the removal process. + May perform better for small to medium-sized containers. * Cons: + Can be slower and more memory-intensive for large containers. + Requires manual iteration, which can lead to bugs if not implemented correctly. 2. **Replacement (`replaceWith`)**: * Pros: + Faster and more efficient than iterative removal. + Easier to implement and less prone to errors. * Cons: + May require more overhead due to the replacement process. **Library Used:** In this benchmark, no specific JavaScript library is used. However, some browsers may have internal optimizations or built-in methods that can affect performance. **Special JS Features/Syntax:** There are none mentioned in this benchmark. **Other Alternatives:** If you need to remove child elements from a container element, here are some alternative approaches: 1. `appendChild(null)`: This method removes the last child element and returns it. 2. `removeChild()`: This method directly removes the specified child element. 3. Using `Array.prototype.filter()` or `Array.prototype.splice()`: These methods can be used to remove elements from an array-like object, but may not work directly on DOM elements. Keep in mind that the best approach depends on your specific use case and requirements. **Benchmark Preparation Code:** The preparation code creates a container element with three child elements, each containing the text "Content". This setup allows for a realistic test scenario. ```javascript var container = document.getElementById('container'); ``` **Individual Test Cases:** Each test case is defined by its benchmark definition (the `while` loop or `replaceWith()` method) and a descriptive name ("remove lastChild" or "replaceWith"). In the provided example, there are only two test cases: 1. `remove lastChild`: This test case uses the `while` loop to remove child elements until there are no more. 2. `replaceWith`: This test case uses the `replaceWith()` method to replace the entire content of the container with new elements. The benchmark result shows the performance metrics for each test case, including executions per second and browser information.
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