Benchmark: createelement vs clone

Tests:

create
var a1 = document.createElement('a'); var a2 = document.createElement('a'); var a3 = document.createElement('a');
clone
var a1 = document.createElement('a'); var a2 = a1.cloneNode(); var a3 = a1.cloneNode();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
create
clone

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.

Let's break down the benchmark and its test cases.

**What is being tested?**

MeasureThat.net is testing two ways to create or clone an HTML element: `document.createElement` and `cloneNode`. These methods are used in JavaScript to create new elements or copy existing ones.

**Options compared**

The two options being compared are:

1. **`document.createElement`**: This method creates a new empty element, which can then be customized with attributes, CSS styles, and content.
2. **`cloneNode`**: This method creates a deep copy of an existing element, including its children, events, and other properties.

**Pros and cons of each approach**

**`document.createElement`**:

Pros:

* Can create new elements from scratch, allowing for more control over the element's structure and behavior.
* Can be used to create complex elements with multiple attributes and styles.

Cons:

* Requires creating a new element object every time, which can lead to memory allocation overhead.
* May not preserve the original element's properties and events if they are dynamically generated or set after creation.

**`cloneNode`**:

Pros:

* Creates a deep copy of an existing element, preserving its structure, attributes, and events.
* Reduces memory allocation overhead since it doesn't create a new element object every time.

Cons:

* Can lead to slower performance due to the overhead of creating a deep copy.
* May not be suitable for complex elements with multiple attributes and styles.

**Library used**

In this benchmark, `cloneNode` is implemented as part of the browser's DOM API. The `cloneNode()` method is a standard part of HTML5 and is supported by most modern browsers.

**Special JavaScript feature or syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. However, it's worth noting that `cloneNode` can be affected by certain security policies and restrictions in some browsers.

**Other alternatives**

If you're looking for alternative ways to create elements or clone existing ones, here are a few options:

* **`document.importNode()`**: This method imports an existing element into a new context, creating a copy of the original element. It's similar to `cloneNode`, but with some differences in behavior.
* **`Element.prototype.slice()`**: This method creates a shallow copy of an element's properties and children. It's not as powerful as `cloneNode`, but can be useful for simple cases.

Keep in mind that these alternatives may have different performance characteristics, compatibility issues, or use cases compared to `document.createElement` and `cloneNode`.

Related benchmarks:

createelement vs clone (version: 0)

Comparing performance of: create vs clone

Created: 7 years ago by: Guest

Jump to the latest result

create

clone

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):