Benchmark: Multiples append calls

HTML Preparation code:

<div id="container"></div>

Script Preparation code:

var container = document.getElementById("container");
var paragraph1 = document.createElement("p");
var paragraph2 = document.createElement("p");
var paragraph3 = document.createElement("p");
var paragraph4 = document.createElement("p");
var paragraph5 = document.createElement("p");

Tests:

append
container.append(paragraph1, paragraph2, paragraph3, paragraph4, paragraph5);
appendChild
container.appendChild(paragraph1); container.appendChild(paragraph2); container.appendChild(paragraph3); container.appendChild(paragraph4); container.appendChild(paragraph5);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
append
appendChild

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0

Browser/OS: Firefox 123 on Windows

View result in a separate tab

Test name	Executions per second
append	4511.8 Ops/sec
appendChild	7430.1 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the explanation into sections to make it easier to understand.

**Benchmark Definition**

The provided JSON represents a JavaScript microbenchmark for measuring the performance of two different approaches: appending elements to an HTML container using `container.append()` versus `container.appendChild()`. The benchmark is designed to test how these two methods compare in terms of execution speed and efficiency.

**Options Compared**

There are two main options being compared:

1. **`append()`**: This method appends multiple elements to the container using a single call, which can be more efficient than making separate calls for each element.
2. **`appendChild()`**: This method appends individual elements to the container one by one, requiring more calls and potentially slower performance.

**Pros and Cons**

*   **`append()`**:
    *   Pros: Can be more efficient because it requires fewer function calls, which can reduce overhead.
    *   Cons: May not work as expected if the number of elements is very large or if there are multiple iterations (like in a loop), since it will append all elements at once and then trigger DOM mutations.
*   **`appendChild()`**:
    *   Pros: Works well with any number of elements, including dynamic or variable-length arrays, because each element is appended individually. This can be beneficial when you need to handle varying amounts of data.
    *   Cons: Requires more function calls, which can increase overhead and potentially decrease performance.

**Library**

The `container` object in the benchmark definition refers to an HTML element created using the JavaScript `document.createElement()` method. The purpose of this library is to provide a simple container element for appending and manipulating elements.

**Special JS Feature/Syntax**

There doesn't appear to be any special JS features or syntax used in this benchmark, but some browsers might perform additional optimizations when working with certain methods.

**Other Alternatives**

If you wanted to create your own equivalent benchmarks, here are other alternatives:

*   For appending multiple elements: 
    *   Using `Array.prototype.push.apply(container.children, [paragraph1, paragraph2, ...])`.
    *   Utilizing an array to store the paragraphs and then calling `container.appendChild(array[0])` followed by `container.appendChild(array[1])`, etc.
*   For appending individual elements:
    *   Calling `document.createElement('div')` for each new element instead of using the same `paragraph1, paragraph2` approach.

This is just a general overview, and performance may vary depending on various factors including browser versions, hardware configurations, and system specifications.

Related benchmarks:

Multiples append calls (version: 0)

Comparing performance of: append vs appendChild

Created: 2 years ago by: Guest

Jump to the latest result

append

appendChild

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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