Benchmark: Creating DIVs through createElement or DOMParser

Tests:

createElement
function test_createElement() { var d = document.createElement('div'); d.setAttribute('comp-id', '123'); return d; }
DOMParser
function test_DOMParser() { const parser = new DOMParser(); const doc = parser.parseFromString('<div comp-id="123"></div>', "text/html"); return doc.body.firstChild; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createElement
DOMParser

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'd be happy to help explain the benchmark and its results.

**What is being tested?**

The provided JSON represents a JavaScript microbenchmark that tests two approaches for creating HTML elements: `createElement` and `DOMParser`. The test measures the performance difference between these two methods in creating a single `<div>` element with an attribute `comp-id`.

**Options compared**

Two options are compared:

1. **`createElement`**: This method uses the `document.createElement()` function to create a new HTML element.
2. **`DOMParser`**: This method uses a `DOMParser` object to parse an HTML string and extract the corresponding element.

**Pros and cons of each approach**

**`createElement`**:

Pros:

* Faster execution time, as it doesn't require parsing or serializing HTML data.
* Easier to use, as it's a straightforward function call.

Cons:

* Requires access to the `document` object, which might be unavailable in some contexts (e.g., Node.js).
* May have browser-specific quirks or optimizations that affect performance.

**`DOMParser`**:

Pros:

* Can create elements without accessing the `document` object, making it more context-agnostic.
* Works well in environments where `createElement` is not available.

Cons:

* Slower execution time due to parsing and serializing HTML data.
* Requires additional imports or setup (e.g., importing the `DOMParser` class).

**Other considerations**

The benchmark doesn't mention any special JavaScript features, syntax, or libraries beyond the standard `document` object. However, it's essential to note that some browsers may optimize or use caching for these functions, which could impact performance.

**Library and library purpose (if applicable)**

In this case, there is no additional library being used.

**Alternative approaches**

Other alternatives to create HTML elements include:

1. **`innerHTML`**: This method sets the inner HTML of an element using a string. However, it's generally slower than `createElement` due to the overhead of parsing and serializing HTML data.
2. **`Element.createNode()`**: This method creates a new DOM node from a given string or XML document fragment. While more efficient than `innerHTML`, it may still incur significant overhead compared to `createElement`.

In summary, the benchmark tests the performance difference between two common approaches for creating HTML elements: `createElement` and `DOMParser`. The choice of approach depends on the specific use case, context, and desired balance between execution speed and simplicity.

Related benchmarks:

Creating DIVs through createElement or DOMParser (version: 0)

Comparing performance of: createElement vs DOMParser

Created: 2 years ago by: Guest

Jump to the latest result

createElement

DOMParser

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):