Benchmark: createElement vs innerHTML

HTML Preparation code:

<div class="x"></div>

Tests:

createElement
let fragment = new DocumentFragment(); for (let i = 0; i < 100_000; i++) { fragment.appendChild(document.createElement("div")); } document.querySelector(".x").append(fragment);
innerHTML
let fragment = ""; for (let i = 0; i < 100_000; i++) { fragment += "<div></div>"; } document.querySelector(".x").innerHTML = fragment;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createElement
innerHTML

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explore what's being tested.

**Benchmark Overview**

The benchmark is designed to compare two approaches for creating HTML elements in JavaScript: `createElement` and `innerHTML`. The goal is to determine which approach is faster, more efficient, or has better performance characteristics.

**Options Compared**

There are two main options compared:

1. **Creating HTML elements using `createElement`**: This method involves calling the `createElement()` function from the `Document` object to create a new HTML element. The created element can then be manipulated and appended to other elements.
2. **Creating HTML elements using `innerHTML`**: This method involves concatenating string literals with HTML tags to construct the desired element structure. Finally, this concatenated string is assigned to an element's `innerHTML` property.

**Pros and Cons of Each Approach**

1. **createElement**:
	* Pros:
		+ More flexible and forgiving, as it allows for dynamic creation of elements.
		+ Can be used with various DOM manipulation techniques (e.g., appending, inserting, removing).
	* Cons:
		+ May incur additional overhead due to the need to create a new element object and append it to another element.
2. **innerHTML**:
	* Pros:
		+ Faster and more efficient, as it avoids the overhead of creating a new element object.
	* Cons:
		+ Less flexible and less forgiving, as it requires precise concatenation of HTML tags and values.
		+ Can lead to security vulnerabilities if not used carefully (e.g., injecting user-inputted data).

**Library and Features Used**

In this benchmark, the `DocumentFragment` object is used in one of the test cases. A `DocumentFragment` represents a container for multiple DOM nodes that are committed all at once when `appendChild()` or `innerHTML` is called on it. In this case, the fragment is created using `createElement()`, and its contents are appended to another element using `appendChild()`. This approach can be useful for improving performance when working with large amounts of HTML content.

**Other Considerations**

* The benchmark uses a fixed test case size (100,000 elements) to compare the performance of both approaches. In real-world scenarios, you might want to vary the test case size or use more realistic usage patterns.
* The benchmark doesn't account for other factors that might affect performance, such as CSS style or layout calculations.
* The results are based on a single browser version and platform combination (Chrome 93 on Windows Desktop). Testing across different browsers, platforms, and devices is essential to ensure the benchmark's accuracy.

**Alternatives**

Other alternatives for creating HTML elements include:

1. **StringTemplate**: A lightweight templating engine that allows you to define templates as strings and then render them using a `render()` method.
2. **DOM libraries like jQuery**: These libraries often provide optimized methods for creating and manipulating DOM elements, such as `$()`, `.append()`, or `.html()`.
3. **Rendered HTML snippets**: Using pre-built, rendered HTML snippets can eliminate the need for client-side rendering altogether.

Keep in mind that each alternative has its trade-offs and use cases. The choice ultimately depends on your specific requirements, performance constraints, and development needs.

Related benchmarks:

createElement vs innerHTML (version: 0)

createElement vs innerHTML

Comparing performance of: createElement vs innerHTML

Created: 4 years ago by: Guest

Jump to the latest result

createElement

innerHTML

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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