Benchmark: style vs. style.cssText4345

HTML Preparation code:

<div id='a'>foo</div>
<div id='b'>bar</div>

Script Preparation code:

var a = document.getElementById('a');
var b = document.getElementById('b');

Tests:

style
a.style.fontSize = `10px`; a.style.letterSpacing = `0.6em`; a.style.wordSpacing = '0em'; var x = a.getBoundingClientRect(); a.style.fontSize = `20px`; a.style.letterSpacing = `0.3em`; a.style.wordSpacing = '0em'; x = a.getBoundingClientRect();
style.cssText
b.style.cssText = `font-size: 10px;letter-spacing:0.6em;word-spacing:0em;`; var x = b.getBoundingClientRect(); b.style.cssText = `font-size:20px;letter-spacing:0.3em;word-spacing:0em;`; x = b.getBoundingClientRect();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style
style.cssText

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.

Let's dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**What is being tested?**

The provided benchmark is designed to compare two approaches for setting CSS styles on HTML elements: using the `style` property directly (Option A) versus using a string value prefixed with `"cssText"` (Option B).

**Options compared:**

1. **Option A: Using the `style` property**
	* This approach involves accessing an element's `style` property, setting individual CSS properties (e.g., `fontSize`, `letterSpacing`, `wordSpacing`) using dot notation, and then retrieving the updated style value using the same `getBoundingClientRect()` method.
2. **Option B: Using a string value prefixed with `"cssText"`**
	* This approach involves accessing an element's `style` property and setting multiple CSS properties in a single string value separated by semicolons (e.g., `"font-size: 10px; letter-spacing: 0.6em; word-spacing: em;"`). The resulting style value is then retrieved using the same `getBoundingClientRect()` method.

**Pros and Cons of each approach:**

1. **Option A:**
	* Pros:
		+ Easier to read and understand, as individual properties are set explicitly.
		+ Can be more efficient if only a subset of properties need to be changed.
	* Cons:
		+ May lead to more CPU cycles spent on accessing and updating individual properties.
		+ Could result in slower performance due to the repeated use of `getBoundingClientRect()`.
2. **Option B:**
	* Pros:
		+ More concise, as multiple properties can be set in a single string value.
		+ Could lead to faster performance if only a few properties need to be changed (since string concatenation is generally faster than property access).
	* Cons:
		+ Can make the code harder to read and understand, especially for those not familiar with this approach.
		+ May lead to slower performance due to the repeated use of `getBoundingClientRect()`.

**Library:**

There is no specific library used in this benchmark. However, it's worth noting that some browsers (like Chrome) have built-in optimizations for certain CSS properties, which could potentially affect performance.

**Special JS feature or syntax:**

This benchmark does not explicitly use any special JavaScript features or syntax. It primarily focuses on the differences between two approaches to setting CSS styles on HTML elements.

**Other alternatives:**

If you were to modify this benchmark, you might consider adding other options, such as:

1. Using a different property name (e.g., `style.cssText`) instead of `"cssText"`.
2. Setting multiple properties using the `style` property with an object (e.g., `{ fontSize: 10, letterSpacing: 0.6, wordSpacing: 'em' }`).
3. Using a library like CSSOM (CSS Object Model) to manipulate styles.

These alternatives could provide additional insights into performance differences and might be worth exploring in future benchmarks.

Related benchmarks:

style vs. style.cssText4345 (version: 0)

Comparing performance of: style vs style.cssText

Created: 6 years ago by: Guest

Jump to the latest result

style

style.cssText

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):