Benchmark: Multi-line detection methods

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); return elementStyles['line-height'] < elementStyles['height'] } 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: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0

Browser/OS: Firefox 91 on Windows

View result in a separate tab

Test name	Executions per second
Multi-line detection using getComputedStyles	354942.9 Ops/sec
Multi-line detection using the NYT method	6037.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

The provided JSON represents two benchmark test cases: "Multi-line detection methods". These tests aim to measure the performance of different approaches for detecting multi-line text in HTML elements.

**Test Case 1: Multi-line detection using getComputedStyles**

This test case uses the `window.getComputedStyle()` method to retrieve the styles of an element, specifically the `line-height` and `height` properties. The benchmark definition code is as follows:
```javascript
function chekele(element) {
  var elementStyles = window.getComputedStyle(element);
  return elementStyles['line-height'] < elementStyles['height']
}
```
This approach has a few pros:

1. Simple and straightforward: It only requires one DOM query and two style property accesses.
2. Fast access to styles: `getComputedStyles()` returns the styles directly, without requiring any additional processing.

However, there are some cons:

1. Resource-intensive: `getComputedStyles()` can be slow due to the overhead of retrieving and parsing styles from the DOM.
2. Limited scope: It only works with elements that have a style attribute defined, which might not cover all cases (e.g., elements with inline styles or CSS classes).

**Test Case 2: Multi-line detection using the NYT method**

This test case uses a more complex approach to detect multi-line text. The benchmark definition code is as follows:
```javascript
function chekele(element) {
  // ...
}
```
The NYT (New York Times) method involves several steps:

1. Extracting words from the element's innerHTML.
2. Creating a new span element for the first word and appending it to the original element.
3. Updating the original element's text content with the remaining words.
4. Measuring the heights of the original element and the first word span.

This approach has some pros:

1. Robustness: It handles various edge cases, such as punctuation, whitespace, and inline styles.
2. Flexibility: It can be adapted to different use cases, like detecting multi-line text in headings or paragraphs.

However, there are some cons:

1. Overhead: Creating new DOM elements and manipulating the element's content can be expensive.
2. Complexity: The NYT method involves multiple steps, which can make it harder to maintain and optimize.

**Library usage**

Neither test case uses any external libraries, except for JavaScript built-in functions like `window.getComputedStyle()` and `document.createElement()`. These libraries are part of the standard JavaScript ecosystem and don't require additional dependencies.

**Special JS features or syntax**

The NYT method uses some advanced JavaScript features, such as:

1. Template literals: Used to create new span elements.
2. DOM manipulation: Involves modifying the element's content and appending new elements.

However, these features are not specific to JavaScript and can be understood by anyone familiar with programming concepts.

**Other alternatives**

There are other approaches for detecting multi-line text in HTML elements, such as:

1. Using a CSS-only solution: Utilizing CSS properties like `line-height` and `height` directly, without relying on JavaScript.
2. Leveraging browser-specific APIs: Some browsers provide APIs for working with layout boxes or text blocks, which might offer better performance for multi-line text detection.

However, these alternatives are not as widely supported across different browsers and may require additional maintenance effort to ensure compatibility.

In conclusion, the provided benchmark test cases demonstrate two different approaches for detecting multi-line text in HTML elements. While both methods have their pros and cons, the NYT method provides a more robust solution with better edge case handling, but comes with a higher overhead due to DOM manipulation.

Related benchmarks:

Multi-line detection methods (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):