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createElement vs createDocumentFragment @oneook 2
(version: 0)
Comparing performance of: createElement vs createDocumentFragment
Comparing performance of:
createElement vs createDocumentFragment
Created:
3 years ago
by:
Guest
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Script Preparation code:
document.body.innerHTML = "";
Tests:
createElement
var root = document.createElement("div"); for (var i = 0; i < 10000; i++) { var e = document.createElement("span"); e.innerText = i + " text"; root.appendChild(e); } document.body.appendChild(root);
createDocumentFragment
var frag = document.createDocumentFragment(); var root = document.createElement("div"); for (var i = 0; i < 10000; i++) { var e = document.createElement("span"); e.innerText = i + " text"; root.appendChild(e); } document.body.appendChild(frag);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
createElement
createDocumentFragment
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 test case and explain what is being tested, compared, and discussed. **What is being tested?** The test case compares two approaches to create a new HTML element: `createElement` vs `createDocumentFragment`. The benchmark measures the performance difference between these two methods when used in a loop to create 10,000 new elements. **Options compared** The options being compared are: 1. **createElement**: This method creates a new DOM element directly. It's a straightforward approach, but it can be slower because it involves creating a new element object and adding it to the DOM tree. 2. **createDocumentFragment**: This method creates a new DOM fragment, which is an invisible container that holds multiple elements. The elements are not added to the DOM tree until `insertBefore()` or `appendChild()` is called on the fragment. **Pros and Cons** * **createElement** + Pros: Easy to understand and implement. No additional memory allocations required. + Cons: Can be slower due to the overhead of creating a new element object and adding it to the DOM tree. * **createDocumentFragment** + Pros: Can be faster because it avoids the overhead of creating a new element object. Also, if only one or two elements are added, the fragment can be reused multiple times, reducing memory allocation. + Cons: Requires more memory upfront because it creates an invisible container (the fragment). **Library and Purpose** The `createDocumentFragment` method is part of the DOM API and is used to create a new DOM fragment. The purpose of this method is to allow for efficient insertion of multiple elements into the DOM tree without creating a new element object for each insertion. **Special JS feature or syntax** None mentioned in the benchmark definition, but it's worth noting that `createDocumentFragment` was introduced in Internet Explorer 5 and has been part of the DOM API since then. Chrome, which is used as the browser in this benchmark, supports `createDocumentFragment`. **Other alternatives** If you're looking for alternative approaches to create HTML elements, here are a few: * **Array.prototype.map()**: Create an array of elements using `map()` and then use `forEach()` or `reduce()` to append them to the DOM tree. * **Array.prototype.push()**: Create an array of elements using `push()` and then append each element individually to the DOM tree. * **Virtual DOM libraries**: Some libraries, like React or Vue.js, use virtual DOMs to optimize rendering. These libraries create a virtual representation of your application's UI and then update the actual DOM only when necessary. Keep in mind that these alternatives may have different performance characteristics depending on the specific use case and requirements.
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createElement vs createDocumentFragment @oneook
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createTextNode vs textContent vs innerText vs innerHTML (for reading)
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