Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
nodeName
(version: 0)
Comparing performance of:
without nodeName vs with nodeName vs with nodeName and nextSibling
Created:
2 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<html> <body> <div id='test'> <div name='a'></div> <div name='b'></div> <div name='c'></div> </div> </body> </html>
Script Preparation code:
var parent = document.getElementById('test');
Tests:
without nodeName
parent.childNodes.forEach(function (node) { let n = node; });
with nodeName
parent.childNodes.forEach(function (node) { let n = node; let x = node.nodeName; });
with nodeName and nextSibling
parent.childNodes.forEach(function (node) { let n = node; let x = node.nodeName; let y = node.nextSibling; });
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
without nodeName
with nodeName
with nodeName and nextSibling
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):
I'd be happy to explain the JavaScript microbenchmark. **Benchmark Overview** The benchmark measures the performance of iterating over `childNodes` in an HTML element using the `forEach` method, with and without accessing the `nodeName` property. The test cases vary by whether they access the `nodeName` property or not, and also if they access the `nextSibling` property. **Script Preparation Code** The script preparation code initializes a variable `parent`, which is an HTML element with three child nodes (`a`, `b`, and `c`). This setup is used to create a consistent test environment for each benchmark. **Html Preparation Code** The html preparation code generates the HTML structure that will be used by the JavaScript code. It creates an `<html>` element, a `<body>` element, and inside it, three `<div>` elements with names `a`, `b`, and `c`. **Options Compared** Three options are compared: 1. **Without nodeName**: The `forEach` method is called on the `childNodes` array without accessing the `nodeName` property. 2. **With nodeName**: The `forEach` method is called on the `childNodes` array, but this time accessing the `nodeName` property for each node. 3. **With nodeName and nextSibling**: This option adds an additional step to the iteration by also accessing the `nextSibling` property for each node. **Pros and Cons of Each Approach** * **Without nodeName**: + Pros: Faster iteration since no extra property access is performed. + Cons: May not accurately represent real-world usage, as `nodeName` might be useful in other scenarios. * **With nodeName**: + Pros: More realistic representation of common use cases, where `nodeName` is often accessed. + Cons: Slower iteration due to the extra property access. * **With nodeName and nextSibling**: + Pros: Provides a more comprehensive view of how `nextSibling` can be used in conjunction with `nodeName`. + Cons: Even slower iteration compared to without accessing `nodeName`, which may not be significant for most use cases. **Library Usage** None of the benchmark code uses any external libraries, so it is self-contained and relies solely on the JavaScript standard library. **Special JS Features or Syntax** This benchmark does not explicitly test any special JavaScript features or syntax. However, the use of `forEach` and `childNodes` may be subject to changes in future JavaScript versions or engine implementations. **Other Alternatives** To measure performance for similar use cases, you might consider using: * **Array.prototype.forEach()**: A more general-purpose alternative to `Element.childNodes.forEach()`. * **Array.prototype.reduce()` or **Array.prototype.some()`**: Other methods that can be used to iterate over arrays or elements. * **Native Web Workers**: If the benchmark is intended for a specific task that can be parallelized, using Web Workers might provide better performance. Keep in mind that this benchmark focuses specifically on iterating over `childNodes` and accessing the `nodeName` property.
Related benchmarks:
Check if in DOM
testtesttesttest
Check if in DOM X
firstChild vs childNodes
Comments
Confirm delete:
Do you really want to delete benchmark?