Benchmark: get width - MeasureThat.net

HTML Preparation code:

<div style="overflow:auto;width:100px;height:100px">
    <div>i am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long texti am a long long long long long long long long text</div>
</div>

Script Preparation code:

window.ele = document.querySelector('div')

Tests:

getComputedStyle
let width = getComputedStyle(ele).width
offSetWidth
let width = ele.offsetWidth
clientWidth
let width = ele.clientWidth
scrollWidth
let width = ele.scrollWidth

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getComputedStyle
offSetWidth
clientWidth
scrollWidth

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):

LLMs can make mistakes. Check important info.

Measuring performance of JavaScript microbenchmarks can be a complex task, as it involves various factors that affect the execution speed of code. Based on the provided Benchmark Definition JSON and test cases, I'll break down what's being tested and compare different approaches.

**What is being tested?**

The benchmark measures the execution time of four different methods to retrieve the width of an element:

1. `getComputedStyle(ele).width`: This method uses the `getComputedStyle` function to retrieve the computed style property (`width`) of an element (`ele`).
2. `ele.offsetWidth`: This method directly accesses the `offsetWidth` property of the element.
3. `ele.clientWidth`: This method directly accesses the `clientWidth` property of the element.
4. `ele.scrollWidth`: This method directly accesses the `scrollWidth` property of the element.

**Options compared:**

The benchmark compares the performance of these four methods, which can be grouped into two categories:

* **DOM-based methods**: `getComputedStyle(ele).width`, `ele.offsetWidth`, `ele.clientWidth`, and `ele.scrollWidth`
	+ These methods rely on accessing specific properties of the element object.
* **Native JavaScript method**: `let width = ele.width` (not shown in the benchmark definition, but implied by the context)
	+ This method uses a native JavaScript property (`width`) to retrieve the element's width.

**Pros and Cons of each approach:**

1. **DOM-based methods**:
	* Pros:
		+ Simple and straightforward implementation
		+ Wide browser support (most modern browsers support `getComputedStyle`)
	* Cons:
		+ May be slower due to additional overhead from accessing DOM properties
2. **Native JavaScript method**: `let width = ele.width`
	* Pros:
		+ Faster execution speed, as it avoids DOM property access
	+ Cons:
		+ Limited browser support (not supported in older browsers or specific edge cases)
3. **Other considerations**:

* Accessing `offsetWidth`, `clientWidth`, and `scrollWidth` properties can be slower than using `getComputedStyle` due to the additional overhead of accessing DOM properties.
* Using native JavaScript properties (`width`) may not provide consistent results across different browsers, as it's not standardized.

**Library usage:**

None of the test cases explicitly use any libraries. However, some modern JavaScript engines might rely on browser-specific features or libraries under the hood.

**Special JS features or syntax:**

The benchmark definition uses a feature called "raw UA string" to provide additional context about the test environment (browser, device platform, operating system). This information can help with interpreting the results and identifying potential issues.

Related benchmarks:

get width (version: 0)

how to get width

Comparing performance of: getComputedStyle vs offSetWidth vs clientWidth vs scrollWidth

Created: 4 years ago by: Guest

Jump to the latest result

getComputedStyle

offSetWidth

clientWidth

scrollWidth

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):