Benchmark: Multi-line detection methods #2

HTML Preparation code:

<h2>This is a multi-<br/>line headline.</h2>

Tests:

Multi-line detection using getComputedStyles
function chekele(element) { var elementStyles = window.getComputedStyle(element); var elementLineHeight = parseInt(elementStyles['line-height'], 10); var elementHeight = parseInt(elementStyles['height'], 10); return elementLineHeight < elementHeight; } chekele(document.querySelector('h2'));
Multi-line detection using the NYT method
function chekele(element) { var firstWordHeight; var elementHeight; var HEIGHT_OFFSET; var elementWords; var firstWord; var ORIGINAL_ELEMENT_TEXT; ORIGINAL_ELEMENT_TEXT = element.innerHTML; // usually there is around a 5px discrepency between // the first word and the height of the whole headline // so subtract the height of the headline by 10 px and // we should be good HEIGHT_OFFSET = 10; // get all the words in the headline as // an array -- will include punctuation // // this is used to put the headline back together elementWords = element.innerHTML.split(' '); // make span for first word and give it an id // so we can access it in le dom firstWord = document.createElement('span'); firstWord.id = 'element-first-word'; firstWord.innerHTML = elementWords[0]; // this is the entire headline // as an array except for first word // // we will append it to the headline after the span elementWords = elementWords.slice(1); // empty the headline and append the span to it element.innerHTML = ''; element.appendChild(firstWord); // add the rest of the element back to it element.innerHTML += ' ' + elementWords.join(' '); // update the first word variable in the dom //firstWord = document.getElementById('element-first-word'); firstWordHeight = firstWord.offsetHeight; console.log(firstWord.offsetHeight); elementHeight = element.offsetHeight; // restore the original element text element.innerHTML = ORIGINAL_ELEMENT_TEXT; // compare the height of the element and the height of the first word return elementHeight - HEIGHT_OFFSET > firstWordHeight; } chekele(document.querySelector('h2'));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Multi-line detection using getComputedStyles
Multi-line detection using the NYT method

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:98.0) Gecko/20100101 Firefox/98.0

Browser/OS: Firefox 98 on Ubuntu

View result in a separate tab

Test name	Executions per second
Multi-line detection using getComputedStyles	198284.8 Ops/sec
Multi-line detection using the NYT method	2790.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down what is tested on the provided JSON and explain the different approaches, pros, cons, and other considerations.

**Benchmark Definition**

The benchmark definition specifies two methods for detecting multi-line headlines in HTML elements:

1. **Method 1: Using `getComputedStyle`**
2. **Method 2: The NYT method (named after its creator, Nicholas Zakas)**

**Method 1: Using `getComputedStyle`**

This approach uses the `window.getComputedStyle` function to retrieve the styles of an HTML element and then parses the `line-height` property to detect multi-line headlines.

Pros:

* Simple and straightforward implementation
* No need to manipulate the DOM or create additional elements

Cons:

* Can be slow and expensive, as it involves a separate trip to the browser's style computation engine
* May not work correctly in all cases, especially with complex styles or font families

**Method 2: The NYT method**

This approach is more sophisticated than Method 1 and uses a combination of DOM manipulation and string processing to detect multi-line headlines.

Pros:

* More accurate and reliable than Method 1, as it takes into account the actual content of the element
* Can be optimized for performance by minimizing the number of DOM mutations

Cons:

* More complex implementation, which may lead to slower execution times or increased memory usage
* Requires more expertise in JavaScript and DOM manipulation

**Library**

In both test cases, no external libraries are explicitly mentioned. However, it's worth noting that the NYT method uses some internal DOM APIs (e.g., `element.innerHTML`, `document.createElement`, and `element.appendChild`) to manipulate the DOM.

**Special JS feature or syntax**

There is no explicit use of special JavaScript features or syntax in these test cases. However, the use of `getComputedStyle` relies on the browser's support for this API, which may not be compatible with older browsers.

**Other alternatives**

If you were to implement an alternative approach to detecting multi-line headlines, some possible options include:

1. **Regular expressions**: You could use regular expressions to extract the line height from the element's styles or content.
2. **CSS-invariant methods**: Instead of relying on `getComputedStyle`, you could use CSS-invariant methods that detect multi-line headlines based solely on their visual appearance, without requiring any style computations.
3. **Machine learning-based approaches**: You could explore using machine learning algorithms to classify elements as multi-line or single-line headlines, which might provide better accuracy and performance than traditional JavaScript approaches.

These alternatives would require significant changes to the implementation, but could potentially offer advantages in terms of accuracy, speed, or robustness.

Related benchmarks:

Multi-line detection methods #2 (version: 0)

Comparing performance of: Multi-line detection using getComputedStyles vs Multi-line detection using the NYT method

Created: 3 years ago by: Guest

Jump to the latest result

Multi-line detection using getComputedStyles

Multi-line detection using the NYT method

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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