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getComputedStyle vs clientWidth
(version: 7)
if one time get style. Better element.clientWidth if two - no difference if three ore more, Better getComputedStyle(element)
Comparing performance of:
getComputedStyle vs clientWidth
Created:
3 years ago
by:
Registered User
Go to the latest result
HTML Preparation code:
<div id='test'></div> <style> #test { width: 100px; height: 100px; backgroundColor: black; } </style>
Tests:
getComputedStyle
let style = getComputedStyle(document.getElementById("test")); let width = parseInt(style).width; let height = parseInt(style).height;
clientWidth
let container = document.getElementById("test"); let width = container.clientWidth; let height = container.clientHeight;
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
getComputedStyle
clientWidth
Fastest:
N/A
Slowest:
N/A
Latest run results:
Run details:
(Test run date:
one year ago
)
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36
Browser/OS:
Chrome 136 on Mac OS X 10.15.7
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Embed
Embed Benchmark Result
<iframe src="https://measurethat.net/Embed?id=608776" width="100%" height="500px"></iframe>
getComputedStyle
2.8M/s
clientWidth
1.8M/s
View exact numbers
Test name
Executions per second
✓
getComputedStyle
2,824,331 Ops/sec
clientWidth
1,794,698 Ops/sec
Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** The provided JSON represents a JavaScript microbenchmark test case for comparing two methods to retrieve an element's width and height: `getComputedStyle` and `clientWidth`. The benchmark aims to determine which method is more efficient in terms of performance. **Options Comparison** There are three options compared: 1. **`getComputedStyle(element)`**: This method retrieves the computed style of a given DOM element. 2. **`element.clientWidth` (and `element.clientHeight` for height)**: These properties return the width and height of an element, respectively. 3. **No difference (i.e., no baseline)**: The benchmark asks whether there's any significant difference between these two approaches. **Pros and Cons** 1. **`getComputedStyle(element)`**: * Pros: + Retrieves accurate style information, including layout and positioning. + May be necessary for complex CSS calculations or animations. * Cons: + Can be slower due to the overhead of getting style information from the DOM. + May require more memory allocation and garbage collection. 2. **`element.clientWidth` (and `element.clientHeight`)**: * Pros: + Generally faster than `getComputedStyle(element)` since it only needs to access a property. + Less memory allocation and garbage collection compared to `getComputedStyle`. * Cons: + May not provide accurate results for elements with complex layouts or CSS rules. **Library Usage** None of the options use any specific JavaScript libraries. However, the benchmark does rely on the `document` object, which is a part of the DOM API. **Special JS Features/Syntax (none)** There are no special JavaScript features or syntax used in this benchmark. **Other Alternatives** If you want to compare these methods with other approaches, consider the following: 1. **Using the `getBoundingClientRect()` method**: This method returns an object containing the element's bounding rectangle, including width and height. 2. **Accessing CSS styles via `window.getComputedStyle()` (IE8-)**: This method is specific to Internet Explorer 8 and earlier versions. It retrieves the computed style of a given DOM element. Keep in mind that these alternatives might have different performance characteristics or requirements compared to `getComputedStyle(element)` and `element.clientWidth`.
Related benchmarks
clientWidth vs offsetWidth vs window.getComputedStyle
clientHeight vs getComputedStyle().height
clientWidth vs offsetWidth vs window.getComputedStyle v2
window.getComputedStyle vs. getBoundingClientRect width
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