Benchmark: Array.from vs Spread vs SetArray

Script Preparation code:

var fooSet = new Set();
for(var i=0;i<10000;i++) {
  fooSet.add(i);
}

Tests:

Array.from
var other = Array.from(fooSet);
Spread
var other = [...fooSet];
setArray
let index = -1 const result = new Array(fooSet.size) fooSet.forEach((value) => { result[++index] = value })

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
Spread
setArray

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 benchmark and its test cases.

**Benchmark Overview**

The benchmark compares three different ways to create an array from a Set object in JavaScript: `Array.from`, spread operator (`...`), and creating an array using a loop.

**Script Preparation Code**

The script preparation code creates a Set object called `fooSet` with 10,000 elements (0-9,999). The set is initialized and populated with values in the script preparation code.

**Html Preparation Code**

There is no HTML preparation code provided for this benchmark.

**Test Cases**

There are three test cases:

1. **Array.from**: This test case creates an array from the `fooSet` using the `Array.from()` method.
2. **Spread**: This test case uses the spread operator (`...`) to create a new array from the `fooSet`.
3. **setArray**: This test case creates a new array by looping through the `fooSet` and pushing each value into the array.

**Library and Features**

The library used in this benchmark is none, as it only relies on built-in JavaScript features.

There are no special JavaScript features or syntax used in this benchmark.

**Options Compared**

The three options compared are:

1. **Array.from**: Uses the `Array.from()` method to create an array from a Set object.
2. **Spread**: Uses the spread operator (`...`) to create a new array from a Set object.
3. **setArray**: Creates an array by looping through the Set object and pushing each value into the array.

**Pros and Cons of Each Approach**

Here's a brief summary of the pros and cons of each approach:

1. **Array.from**:
	* Pros: Efficient, concise, and modern syntax.
	* Cons: May be slower than other methods for very large datasets due to the overhead of creating an array from a Set object.
2. **Spread**:
	* Pros: Easy to read and write, works well with modern JavaScript features.
	* Cons: Can be slower than `Array.from` for large datasets due to the overhead of creating an array and pushing elements into it.
3. **setArray**:
	* Pros: Simple, straightforward approach that avoids creating intermediate arrays.
	* Cons: May be less efficient and more verbose than other methods.

**Other Considerations**

When choosing between these options, consider the following factors:

* Performance: If you need to work with large datasets, `Array.from` might be a better choice due to its efficiency. However, for small to medium-sized datasets, the differences may not be noticeable.
* Readability and maintainability: The spread operator (`...`) is often considered easier to read and write than `Array.from`, especially for those familiar with modern JavaScript features.

**Alternatives**

Other alternatives to these methods include:

* Using a library like Lodash or Ramda, which provide more functional programming features and can simplify working with sets and arrays.
* Implementing custom logic for creating arrays from Sets, such as using a native browser API like `Uint8Array` or `TypedArray`.

Keep in mind that the choice of method ultimately depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

Array.from vs Spread vs SetArray (version: 0)

Comparing performance of: Array.from vs Spread vs setArray

Created: 4 years ago by: Guest

Jump to the latest result

Array.from

Spread

setArray

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):