Toggle navigation
MeasureThat.net
Create a benchmark
Tools
Feedback
FAQ
Register
Log In
getElementById, querySelector, windowqsd
(version: 0)
Comparing performance of:
getElementById vs querySelector vs window
Created:
5 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div id="test">Test</div>
Tests:
getElementById
document.getElementById("test");
querySelector
document.querySelector("#test")
window
test
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
Fork
Test case name
Result
getElementById
querySelector
window
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
gemma2:9b
, generated one year ago):
This benchmark compares three different methods for retrieving an element from an HTML document: **1. `getElementById`:** This method takes the ID of an element as input and returns the first element with that ID. It's straightforward and efficient when you know the exact ID of the element you need. * **Pros:** * Fast because it relies on a direct lookup by ID, which is a unique identifier for each element. * **Cons:** * Only works if the target element has a unique ID attribute set. If multiple elements share an ID, it will only return the first one encountered. **2. `querySelector`:** This method uses CSS selectors to search for an element in the document. It's more flexible than `getElementById` because you can use various CSS selectors to target elements based on attributes, classes, or even their position within the DOM tree. * **Pros:** * More versatile due to its ability to use CSS selectors. This allows you to select multiple elements, target elements by class name, or even apply complex selection criteria. * **Cons:** * Can be slightly slower than `getElementById` in simple cases because it involves parsing the CSS selector and traversing the DOM tree. However, for more complex selections, it's often faster than repeatedly using `getElementById`. **3. `window`:** This method seems out of place. The provided definition "test" doesn't actually interact with the document or elements. It likely represents a placeholder or an error in the benchmark setup. **Alternatives:** * **Libraries like jQuery:** While not directly compared in this benchmark, libraries like jQuery often offer simplified and optimized methods for DOM manipulation, including element selection. They can abstract away some of the complexity and potentially improve performance. * **Direct access with `Array.prototype` (for simple cases):** If you know the exact index of the element within a parent node's children, you could directly access it using array indexing (`parentNode.children[index]`), which might be faster than any of the mentioned methods in very specific scenarios. Let me know if you have any other questions!
Related benchmarks:
getElementById, querySelector, window
getElementById, querySelector, window
getElementById, querySelector, window
getElementById, querySelector, window
Comments
Confirm delete:
Do you really want to delete benchmark?