Benchmark: template test - tagName vs content

HTML Preparation code:

<html>
<template></template>
</html>

Script Preparation code:

var element = document.documentElement.querySelector('template')

Tests:

tagName
element.tagName === 'TEMPLATE'
content
!!element.content

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
tagName
content

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
tagName	14449246.0 Ops/sec
content	15095665.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the JavaScript microbenchmark on MeasureThat.net.

**What is being tested?**

The benchmark measures the performance difference between two approaches when checking the `content` and `tagName` properties of an HTML template element.

**Options compared:**

Two options are being compared:

1. **Using `!!element.content`**: This approach uses a double-not operator (`!!`) to evaluate the `content` property as a boolean value (true or false). This is equivalent to checking if the content is truthy.
2. **Using `element.tagName === 'TEMPLATE'`**: This approach directly compares the `tagName` property with the string `'TEMPLATE'`.

**Pros and cons of each approach:**

* **Using `!!element.content`**:
	+ Pros: More concise, easier to read, and less prone to typos.
	+ Cons: May be slower due to the double-not operator evaluation. This is because `!!` creates a new boolean value, which can lead to additional overhead compared to a simple string comparison.
* **Using `element.tagName === 'TEMPLATE'`**:
	+ Pros: Faster, as it directly compares two strings without creating an intermediate boolean value.
	+ Cons: More verbose and error-prone due to the need for exact string matching.

**Library usage:**

None of the test cases use any libraries. The benchmark only relies on built-in JavaScript features.

**Special JS feature or syntax:**

* **Template literals**: Although not explicitly used in this benchmark, template literals are a feature introduced in ECMAScript 2015 (ES6). They allow for more readable and efficient string interpolation.
* **Double-not operator (`!!`)**: This is a shorthand operator that converts its operand to a boolean value. It's commonly used as a way to simplify conditional checks.

**Other alternatives:**

Instead of using `element.tagName === 'TEMPLATE'`, alternative approaches could be:

* Using the `innerHTML` property, which would return the HTML content of the element (including any template tags). This approach might be slower and less accurate.
* Using regular expressions to match the tag name. This approach would also be slower and less readable.

For comparison with `!!element.content`, alternative approaches could be:

* Using a ternary operator (`condition ? value : false`) to evaluate the content property as a boolean value.
* Using the `Boolean()` function to convert the content property to a boolean value.

Keep in mind that these alternatives might have different performance characteristics and are not necessarily recommended over the original approaches.

Related benchmarks:

template test - tagName vs content (version: 0)

Comparing performance of: tagName vs content

Created: 2 years ago by: Guest

Jump to the latest result

tagName

content

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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