Benchmark: Element append vs appendChild

Script Preparation code:

var el1 = document.createElement('div')
var el2 = document.createElement('div')

var child1 = document.createElement('div')
var child2 = document.createElement('div')

Tests:

Element.append()
el1.append(child1)
Element.appendChild()
el2.appendChild(child2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Element.append()
Element.appendChild()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Browser/OS: Chrome 91 on Windows

View result in a separate tab

Test name	Executions per second
Element.append()	1151152.4 Ops/sec
Element.appendChild()	1333306.6 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition JSON**

The provided JSON represents a JavaScript microbenchmark named "Element append vs appendChild". This benchmark compares the performance of two methods: `el1.append(child1)` and `el2.appendChild(child2)`, which are used to add child elements to an existing DOM element (`el1` and `el2`).

**Options Compared**

The benchmark is comparing two options:

1. `append`: The `append` method is a built-in JavaScript method that appends one or more elements to the end of another element.
2. `appendChild`: The `appendChild` method is also a built-in JavaScript method, but it's used to append a single child element to an existing DOM element.

**Pros and Cons**

Here are some pros and cons of each approach:

* `append`:
	+ Pros: Simple and concise syntax, easy to read.
	+ Cons: May be slower than `appendChild` due to the need to create a new node.
* `appendChild`:
	+ Pros: More efficient and optimized for performance, as it only creates a single child node.
	+ Cons: More verbose syntax, requires more characters.

**Library and Purpose**

The benchmark does not explicitly mention any libraries. However, it uses the `document.createElement` method to create DOM elements, which is part of the standard JavaScript API.

**Special JS Feature or Syntax**

There are no special JS features or syntax used in this benchmark. The code only uses standard JavaScript methods and properties.

**Other Considerations**

When writing benchmarks like this one, consider the following:

* Use a consistent naming convention for variables and functions.
* Keep the test cases simple and focused on the specific behavior being measured.
* Use a reliable method to execute the tests multiple times to ensure accurate results.
* Consider adding more test cases to cover different scenarios or edge cases.

**Alternatives**

If you need to write similar benchmarks, consider using other JavaScript testing frameworks like:

* Jest
* Mocha
* Benchmark.js (which is similar to MeasureThat.net)
* WebPerformanceTest

These tools can help you create more robust and reliable benchmarks, and provide additional features like automated reporting and visualization.

Related benchmarks:

Element append vs appendChild (version: 0)

Comparing performance of: Element.append() vs Element.appendChild()

Created: 3 years ago by: Guest

Jump to the latest result

Element.append()

Element.appendChild()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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