Benchmark: f8548757-0635-4d3a-b85b-02731a8c5440

Tests:

createElement
var list = [], n = 0; while(true) { n++; const p = document.createElement('p'); p.classList.add('class'); p.appendChild(document.createTextNode('Foo ')); const aP = document.createElement('a'); aP.classList.add('another-class'); aP.setAttribute('href', '#'); aP.textContent = 'bar'; p.appendChild(aP); p.appendChild(document.createTextNode(' baz ')); const aC = document.createElement('a'); aC.setAttribute('href', '#'); aC.textContent = 'quux'; p.appendChild(aC); list.push(p); if(n===10000) break; }
cloneNode
var list = [], n = 0; const p = document.createElement('p'); p.classList.add('class'); p.appendChild(document.createTextNode('Foo ')); const aP = document.createElement('a'); aP.classList.add('another-class'); aP.setAttribute('href', '#'); aP.textContent = 'bar'; p.appendChild(aP); p.appendChild(document.createTextNode(' baz ')); const aC = document.createElement('a'); aC.setAttribute('href', '#'); aC.textContent = 'quux'; p.appendChild(aC); while(true) { n++; list.push(p.cloneNode(true)); if(n===10000) break; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
createElement
cloneNode

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 provided JSON data and explain what's being tested.

**Benchmark Definition**

The provided JSON defines two benchmark tests: `createElement` and `cloneNode`. The `Script Preparation Code` is empty, which means no specific setup or initialization code is required for these benchmarks. This suggests that the focus is on measuring the performance of the actual JavaScript functions.

**What's being tested?**

Both benchmarks create a series of HTML elements using the `document.createElement()` method and append them to an array (`list`). The main difference between the two tests lies in what happens after creating the initial element:

1.  **createElement**: This test simply creates one element, sets some attributes, and appends text nodes to it. The loop continues until it reaches 10,000 iterations.
2.  **cloneNode**: In this test, a clone of the initially created element is appended to the array instead of creating a new one.

**Options compared**

In these benchmarks:

*   **createElement vs. cloneNode**: We see two different approaches to creating and appending elements:
    *   `createElement` creates a new element from scratch each time.
    *   `cloneNode` clones an existing element, which could potentially be faster since it avoids the overhead of creating a new DOM node.

**Pros and Cons**

*   **createElement**:
    *   Pros: Simple to implement, easy to understand. It directly tests the creation functionality of the method.
    *   Cons: Creates multiple elements, which can lead to increased memory usage and slower performance if not optimized.
*   **cloneNode**:
    *   Pros: Can be faster since it avoids creating new DOM nodes, potentially reducing memory allocation and deallocation overhead. It also tests how the browser handles cloning existing nodes.
    *   Cons: May have more complex behavior depending on the browser's implementation of `cloneNode()`, as some implementations might return null or throw errors under certain conditions.

**Libraries and Special JS Features**

There are no explicit library calls in these benchmarks, but note that using libraries like jQuery can affect performance by adding overhead from DOM manipulation and event handling. The use of `cloneNode()` is a standard method for cloning DOM elements, so it's likely intended to test the browser's implementation of this feature.

**Special JS Features**

No special JavaScript features or syntax are used in these benchmarks. They are focused on measuring the performance of simple, well-known methods like creating and cloning DOM elements.

**Other Alternatives**

For benchmarking JavaScript performance, other tools like:

*   **Benchmark.js**: A popular benchmarking library that provides a simple way to create and run tests.
*   **Sieve.js**: Another benchmarking library that allows you to measure the performance of your code in a more controlled environment.
*   **jsPerf**: A built-in browser developer tool for measuring JavaScript performance.

These alternatives can provide more comprehensive results or offer additional features like automated test discovery and visualization.

Related benchmarks:

f8548757-0635-4d3a-b85b-02731a8c5440 (version: 0)

Comparing performance of: createElement vs cloneNode

Created: 3 years ago by: Guest

Jump to the latest result

createElement

cloneNode

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):