Benchmark: svg line element setAttribute vs. className.baseVal

HTML Preparation code:

<svg xmlns="http://www.w3.org/2000/svg"><defs><symbol><line></line></symbol></defs></svg>

Script Preparation code:

var element = document.getElementsByTagName("line")[0];

Tests:

className.baseVal
var i = 1000; while (i--) { element.className.baseVal = "bar"; }
setAttribute
var i = 1000; while (i--) { element.setAttribute("class", "bar"); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
className.baseVal
setAttribute

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Browser/OS: Chrome 143 on Windows

View result in a separate tab

Test name	Executions per second
className.baseVal	2529.3 Ops/sec
setAttribute	2963.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition JSON**

The benchmark is designed to compare two approaches for setting a class name on an SVG line element:

1. **Setting `className.baseVal`**: This approach sets the base value of the `class` attribute directly.
2. **Setting `setAttribute("class", "bar")`**: This approach uses the `setAttribute()` method to set the `class` attribute with the specified value.

**Options Compared**

The benchmark compares two options:

* Option 1: Setting `className.baseVal`
* Option 2: Using `setAttribute("class", "bar")`

**Pros and Cons of Each Approach**

* **Option 1 (Setting `className.baseVal`)**:
	+ Pros:
		- Typically faster, since it's a direct property access.
		- May be more efficient in terms of memory allocation, as it doesn't create an additional string object.
	+ Cons:
		- Some browsers may have performance issues with this approach due to the way `class` attributes are handled.
* **Option 2 (Using `setAttribute("class", "bar")`)**:
	+ Pros:
		- More widely supported, as it's a standard method for setting attribute values.
		- May be more predictable in terms of behavior across different browsers and versions.
	+ Cons:
		- Typically slower than Option 1, due to the overhead of creating an additional string object.

**Library Used**

There is no library explicitly mentioned in the benchmark definition. However, it's likely that the benchmark uses a basic HTML parser or DOM manipulation library under the hood to create and manipulate the SVG elements.

**Special JS Feature or Syntax**

None of the test cases use any special JavaScript features or syntax beyond what's standard for setting attribute values.

**Other Alternatives**

Other alternatives to these two approaches might include:

* Using `style` attributes instead of `class` attributes (e.g., `element.style.color = "bar"`).
* Using CSS classes and applying them dynamically using the `classList` API (e.g., `element.classList.add("bar")`).

However, these alternatives are not tested in this benchmark.

Related benchmarks:

svg line element setAttribute vs. className.baseVal (version: 0)

Comparing performance of: className.baseVal vs setAttribute

Created: 6 years ago by: Guest

Jump to the latest result

className.baseVal

setAttribute

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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