Benchmark: Set style vs setAtrribute("style") 4

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');
function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

Tests:

style by property
elem.style.width = getRandomInt(500) + 'px'; elem.style.height = '50px'; elem.style.top = '40px'; elem.style.left = '90px'; i++;
style by name
elem.style['width'] = getRandomInt(500) + 'px'; elem.style['height'] = '50px'; elem.style['top'] = '40px'; elem.style['left'] = '90px';
setAttribute
elem.setAttribute("style","width:" + getRandomInt(500) + "px;height:50px;top:40px;left:90px;");

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:

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

LLMs can make mistakes. Check important info.

The provided JSON represents a JavaScript microbenchmarking test case, designed to compare the performance of three different approaches for setting the style attribute of an HTML element.

**Options compared:**

1. **Setting styles directly using properties (e.g., `elem.style.width = ...`)**: This approach involves accessing the element's style object and assigning new values directly.
2. **Using the `setAttribute()` method with a string**: This approach involves setting the style attribute of the element as a string, rather than using individual property assignments.

**Pros and cons:**

1. Setting styles directly using properties:
	* Pros: More readable and maintainable code, as it separates the assignment of new values from the existing style.
	* Cons: May lead to slower performance due to the overhead of accessing the element's style object and assigning new values.
2. Using the `setAttribute()` method with a string:
	* Pros: Can be faster, as it avoids the overhead of accessing the element's style object and assigning new values. However, this approach can also increase the risk of errors if the string is malformed or not properly formatted.
	* Cons: May lead to less readable and maintainable code, as the assignment of new values becomes entangled with the existing style attribute.

**Library/Feature usage:**

The test case uses the `Math.random()` function from the built-in JavaScript library. This function generates a random number between 0 (inclusive) and the specified maximum value (exclusive).

**Special JS features or syntax:**

None of the provided code snippets use any special JavaScript features or syntax.

**Other alternatives:**

1. Setting styles using CSS attributes (e.g., `elem.style.width = '500px'`): This approach is similar to setting styles directly using properties, but it uses CSS-specific attribute syntax.
2. Using a template string with the `style` attribute (e.g., `elem.setAttribute('style', 'width: 500px; height: 50px; top: 40px; left: 90px;')`): This approach is similar to using the `setAttribute()` method with a string, but it uses template strings to format the style attribute.

**Benchmarking context:**

The test case measures the performance of setting styles directly using properties and using the `setAttribute()` method with a string. The benchmark is designed to capture the execution time of each approach on different browsers and devices.

Related benchmarks:

Set style vs setAtrribute("style") 4 (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):