Benchmark: Set style vs setAtrribute("style") 3

HTML Preparation code:

<div id="element" style="background:#555;color:#FFF;position:absolute;left:0;top:0;width:400px;height:100px;">
</div>

Script Preparation code:

  var elem = document.getElementById('element');
i = 0;

Tests:

style by property
elem.style.width = i + 'px'; elem.style.height = i + 'px'; elem.style.top = i + 'px'; elem.style.left = i + 'px'; i++;
style by name
elem.style['width'] = i + 'px'; elem.style['height'] = i + 'px'; elem.style['top'] = i + 'px'; elem.style['left'] = i + 'px'; i++;
setAttribute
elem.setAttribute('style','width:' + i + 'px;height:' + i + 'px;top:' + i + 'px;left:' + i + 'px;'); i++;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style by property
style by name
setAttribute

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and explain what's being tested, the pros and cons of each approach, and other considerations.

**Benchmark Definition:**

The website `MeasureThat.net` provides a JSON representation of the benchmark, which includes:

* A brief description of the test case
* Script preparation code that initializes variables and sets up the environment for the test
* HTML preparation code that defines the HTML structure used in the test
* Three individual test cases:
	1. "style by property"
	2. "style by name"
	3. "setAttribute"

**Test Cases:**

Each test case has a unique benchmark definition, which is executed repeatedly to measure performance.

### 1. "style by property"

```javascript
elem.style.width = i + 'px';
elem.style.height = i + 'px';
elem.style.top = i + 'px';
elem.style.left = i + 'px';
i++;
```

This test case sets the `width`, `height`, `top`, and `left` properties of an HTML element using the dot notation (`style.property`). The value of these properties is set to a string that increments by 1 for each iteration, starting from 0.

**Pros:**

* Simple and straightforward approach
* No additional library or syntax dependencies

**Cons:**

* May be slower due to the overhead of accessing properties on the `style` object
* Less efficient than setting attributes directly, as described in the next test case

### 2. "style by name"

```javascript
elem.style['width'] = i + 'px';
elem.style['height'] = i + 'px';
elem.style['top'] = i + 'px';
elem.style['left'] = i + 'px';
i++;
```

This test case sets the `width`, `height`, `top`, and `left` properties of an HTML element using bracket notation (`style['property']`). The value of these properties is set to a string that increments by 1 for each iteration, starting from 0.

**Pros:**

* Faster than accessing properties on the `style` object
* More efficient than setting attributes directly

**Cons:**

* Requires knowing the property names in advance (e.g., `width`, `height`, etc.)
* May be less readable and maintainable compared to dot notation

### 3. "setAttribute"

```javascript
elem.setAttribute('style', 'width:' + i + 'px;height:' + i + 'px;top:' + i + 'px;left:' + i + 'px;');
i++;
```

This test case sets the `style` attribute of an HTML element using the `setAttribute()` method. The value of this attribute is set to a string that increments by 1 for each iteration, starting from 0.

**Pros:**

* Fastest approach among the three
* Most efficient way to set multiple properties at once

**Cons:**

* Requires setting up the `style` attribute separately, which may be less intuitive than accessing properties directly
* May not work as expected if the element already has a `style` attribute set (e.g., from an HTML file or CSS)

**Other Considerations:**

* The benchmark uses Firefox 65 and Windows 10.0 as the baseline browser.
* The test cases are designed to measure performance, so the focus is on execution speed and efficiency rather than readability or maintainability.
* Other alternatives for setting styles or attributes include using CSS classes, JavaScript objects, or custom libraries.

Keep in mind that these explanations assume a basic understanding of HTML, JavaScript, and web development. If you have any further questions or need more clarification, feel free to ask!

Related benchmarks:

Set style vs setAtrribute("style") 3 (version: 0)

Comparing performance of: style by property vs style by name vs setAttribute

Created: 7 years ago by: Guest

Jump to the latest result

style by property

style by name

setAttribute

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):