Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
aaaaaaaaa
(version: 0)
aaaaaaaaaa
Comparing performance of:
bbbbbbbbbbbbbbbb vs cccccccccccccc
Created:
8 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<body id="foo"></body>
Script Preparation code:
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.className = "bar"; }
Tests:
bbbbbbbbbbbbbbbb
var element = document.body; var i = 1000; while (i--) { element.className = "bar"; }
cccccccccccccc
var element = document.querySelector("button"); var i = 1000; while (i--) { element.className = "bar"; }
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
Fork
Test case name
Result
bbbbbbbbbbbbbbbb
cccccccccccccc
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):
**Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark definition and test cases represent a simple example of how the platform works. **What is Tested?** The benchmark tests two different approaches to selecting an HTML element using JavaScript: 1. **`document.body`**: This approach uses the `document.body` property to access the entire HTML document body. 2. **`document.querySelector()`**: This approach uses the `document.querySelector()` method, which allows you to select a single element from the DOM based on its CSS selector. **Options Compared** The two approaches are compared in terms of their performance and efficiency. The test case that uses `document.body` will execute faster for larger documents, as it doesn't require the browser to traverse the DOM to find the selected element. On the other hand, the test case that uses `document.querySelector()` is more flexible and can handle complex selections, but may be slower due to the additional overhead of parsing the CSS selector. **Pros and Cons** * **`document.body`**: + Pros: Faster execution time for larger documents. + Cons: May not work correctly if the document has a different structure than expected. * **`document.querySelector()`**: + Pros: More flexible and can handle complex selections. + Cons: May be slower due to the additional overhead of parsing the CSS selector. **Library Used** In this benchmark, no specific library is used. However, `document.querySelector()` relies on the W3C CSS Selector API, which is a widely supported standard for selecting elements in web browsers. **Special JavaScript Feature or Syntax** There are no special JavaScript features or syntaxes being tested in this benchmark. The code only uses basic JavaScript syntax and constructs. **Other Considerations** When running benchmarks like this one, it's essential to consider the following: * **Document size**: The size of the document can significantly impact the performance of the `document.body` approach. * **CSS selector complexity**: The complexity of the CSS selector used in `document.querySelector()` can also affect performance. * **Browser version and platform**: Different browsers and platforms may have varying levels of support for certain features or syntaxes. **Alternative Approaches** Other approaches to selecting an HTML element using JavaScript include: * Using `document.getElementById()` instead of `document.querySelector()`. * Using a library like jQuery or React to simplify DOM manipulation. * Using a different CSS selector API, such as Sizzle or Query. Keep in mind that these alternatives may have different performance characteristics and use cases than the approaches tested in this benchmark.
Related benchmarks:
className vs. setAttribute vs. classList
className vs. setAttribute vs. classList many
test123v6
test123v7
Comments
Confirm delete:
Do you really want to delete benchmark?