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(version: 0)
Comparing performance of:
inner vs fragment
Created:
4 years ago
by:
Guest
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Tests:
inner
const el = document.createElement('div'); el.innerHTML = ` <h1>Heading</h1> <p>Paragraph 1</p> <p>Paragraph 2</p> `; document.documentElement.appendChild(el);
fragment
const fragment = document.createDocumentFragment(); const el = document.createElement('div'); const heading = document.createElement('h1'); const para1 = document.createElement('p'); const para2 = document.createElement('p'); heading.innerText = 'Heading'; para1.innerText = 'Paragraph 1'; para2.innerText = 'Paragraph 2'; el.appendChild(heading); el.appendChild(para1); el.appendChild(para2); fragment.appendChild(el); document.documentElement.appendChild(fragment);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
inner
fragment
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested, compared options, pros/cons of each approach, library usage, special JavaScript features/syntax, and other considerations. **Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark consists of two test cases: "inner" and "fragment". Each test case measures the performance of creating and appending elements to the document. **Test Case 1: "inner"** This test case measures the performance of creating an element's inner HTML directly using `el.innerHTML = ...`. Specifically, it creates a `div` element, sets its inner HTML with an HTML string containing two paragraphs and an `<h1>` heading, and then appends the element to the document. **Test Case 2: "fragment"** This test case measures the performance of creating a `DocumentFragment` object, appending elements to it, and then appending the fragment to the document. Specifically, it creates three elements (`<div>`, `<h1>`, and two `<p>` elements), sets their text content, and appends them to the fragment. Finally, it appends the fragment to the document. **Comparison Options** The benchmark compares the performance of creating elements using: 1. `el.innerHTML = ...` (Test Case 1: "inner") 2. Creating a `DocumentFragment` object and appending elements to it (Test Case 2: "fragment") **Pros/Cons of Each Approach** * **Direct inner HTML assignment**: This approach is simple and efficient, as it only requires setting the element's text content and doesn't create additional objects or fragment instances. + Pros: easy to implement, fast execution time + Cons: can be slower due to string parsing, potential security issues if using user-input data * **DocumentFragment**: Creating a fragment allows for more efficient appending of elements, as it avoids the overhead of creating and destroying DOM nodes. However, this approach requires creating an additional object instance. + Pros: faster execution time, more efficient resource usage + Cons: slightly more complex implementation, requires creating an extra object instance **Library Usage** There is no library used in these test cases. **Special JavaScript Features/Syntax** Neither of the test cases uses any special JavaScript features or syntax that are not part of standard JavaScript. However, it's worth noting that using `inner HTML` assignment can lead to potential security vulnerabilities if using user-input data. **Other Considerations** * The benchmark measures the performance of creating and appending elements in a specific environment (Chrome 92 on Windows Desktop). * The test cases assume that the document is already available in the context of the script. * The benchmark result provides information about the browser, device platform, operating system, executions per second, and raw UA string. **Alternative Approaches** Other alternatives for creating elements in JavaScript include: 1. Using `createElement` method with a template literal or string interpolation (e.g., `const el = document.createElement('div'); const textContent = 'Hello World'; el.textContent = textContent;`) 2. Utilizing HTML parsing libraries like DOMParser or cheerio 3. Leveraging modern features like Web Components or custom elements Keep in mind that the choice of approach depends on the specific use case, performance requirements, and desired development experience.
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