Benchmark: append vs appendChild with lists fix

Script Preparation code:

var div = document.createElement('div');
var div1 = document.createElement('div');
var div2 = document.createElement('div');
var div3 = document.createElement('div');
var div4 = document.createElement('div');
var div5 = document.createElement('div');
var l = [div1, div2, div3, div4, div5]

Tests:

append
div.append(...l)
appendChild
l.forEach(d => { div.appendChild(d) })

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 benchmark and explain what is being tested.

**What is being tested?**

The benchmark compares two approaches to appending elements to an HTML list: `div.append(...l)` and `l.forEach(d => { div.appendChild(d) })`. The test case uses a JavaScript library, Lodash (specifically, its `forEach` function), which is used to iterate over the `l` array.

**Options compared**

The two options being compared are:

1. `div.append(...l)`: This method directly appends all elements of the `l` array to the `div` element.
2. `l.forEach(d => { div.appendChild(d) })`: This approach iterates over each element in the `l` array and appends it to the `div` element using the `appendChild` method.

**Pros and Cons**

1. **`div.append(...l)`**:
	* Pros: Simple, concise, and may be faster since it only requires a single method call.
	* Cons: May not work as expected if the `l` array contains complex objects or nested elements, which would cause them to be appended in their entirety.
2. **`l.forEach(d => { div.appendChild(d) })`**:
	* Pros: More flexible and robust since it allows for individual element manipulation and handling of complex objects or nested elements.
	* Cons: May be slower due to the iteration over the array, which could result in more CPU cycles.

**Library**

The Lodash library is used here. Specifically, its `forEach` function is used to iterate over the `l` array. The purpose of using a library like Lodash is to provide a reusable and maintainable way to perform common operations, such as iterating over arrays.

**Special JS feature or syntax**

There are no special JavaScript features or syntax used in this benchmark that would require additional explanation.

**Other alternatives**

If the benchmark were to include other approaches, some possible alternatives could be:

1. Using `Array.prototype.forEach.call(div, d => { div.appendChild(d) })`: This approach uses the `forEach` method on an array-like object (in this case, the `div` element), which would allow for a more concise and efficient implementation.
2. Using `l.reduce((acc, curr) => acc.push(curr), [])`: This approach uses the `reduce` method to accumulate elements in a new array, which could then be appended to the `div` element.

However, these alternatives are not included in the provided benchmark, so it's difficult to say whether they would affect the results or performance characteristics.

Related benchmarks:

append vs appendChild with lists fix (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):