Benchmark: JS: append vs appendChild with multiples nodes

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:

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

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Let's break down the provided JSON data and explain what's being tested, compared, and other considerations.

**Benchmark Definition**

The benchmark definition is represented by two test cases: `append` and `appendChild`. Both tests are designed to measure the performance of appending multiple child nodes to a container element using JavaScript.

**Test Cases**

1. **Append**: This test case uses the `container.append()` method to append five paragraph elements (paragraph1, paragraph2, paragraph3, paragraph4, and paragraph5) to the container element.
2. **AppendChild**: This test case uses the `container.appendChild()` method to append each of the same five paragraph elements individually.

**Comparison**

The two tests are compared in terms of their performance, specifically the number of executions per second (ExecutionsPerSecond). The benchmark aims to determine which approach is faster: appending multiple nodes at once using `append()` or appending individual nodes using `appendChild()`.

**Options Compared**

* **Append vs AppendChild**: These two methods have different approaches:
	+ **Append**: This method adds the specified elements as a single argument, creating an array of child nodes. It's generally faster because it reduces the overhead of multiple DOM mutations.
	+ **AppendChild**: This method takes each element individually and appends them one by one. While this approach is more explicit, it's slower due to the repeated DOM mutations.
* **Native vs Browser-specific implementations**: Both `append()` and `appendChild()` are implemented differently in browsers. The benchmark might compare these native implementations or browser-specific optimizations.

**Pros and Cons**

* **Append**:
	+ Pros: Generally faster due to reduced DOM mutation overhead
	+ Cons: May not be as readable or maintainable, especially for complex operations
* **AppendChild**:
	+ Pros: More explicit and easier to understand, but slower due to repeated DOM mutations
	+ Cons: Slower performance compared to `append()`

**Other Considerations**

* **DOM Mutation**: Both tests involve modifying the DOM. The benchmark might consider factors like the browser's rendering engine, layout complexity, or event handling overhead.
* **Browser-specific optimizations**: Some browsers might optimize their implementations of `append()` and `appendChild()` differently, affecting the results.

**Library and Purpose**

None are explicitly mentioned in this benchmark. However, JavaScript engines and browsers often rely on internal libraries and optimizations to implement these methods.

**Special JS Features or Syntax**

There are no specific features or syntaxes being tested in this benchmark. The focus is on comparing the performance of `append()` and `appendChild()`.

**Alternatives**

To measure similar performance characteristics:

* Measure the time it takes to append a single element instead of multiple elements.
* Compare the performance of other DOM methods, such as `insertAdjacentHTML()`, `DOMElement.insertBefore()`, or `Node.appendChild()`.
* Test the performance of different JavaScript engines or browsers using other microbenchmarks.

Keep in mind that this benchmark is specific to comparing `append()` and `appendChild()` for appending multiple child nodes. Other benchmarks might focus on different aspects, such as DOM mutation overhead, event handling performance, or rendering engine optimizations.

Related benchmarks:

JS: append vs appendChild with multiples nodes (version: 0)

Comparing performance of: append vs appendChild

Created: 3 years ago by: Guest

Jump to the latest result

append

appendChild

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):