Benchmark: Array.from vs Spread + addition of element

Tests:

Array.from
var fooSet = new Set(); for(var i=0;i<100;i++) { fooSet.add(i); } var other = Array.from(fooSet); other.push(1000)
Spread
var fooSet = new Set(); for(var i=0;i<100;i++) { fooSet.add(i); } var other = [...fooSet, 1000];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
Spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON data to explain what is tested on MeasureThat.net.

**Benchmark Definition**: The website uses a benchmark definition json that represents a simple JavaScript microbenchmark. In this case, it compares two approaches:

1. **Array.from() method**: This method creates a new array from an iterable or an array-like object.
2. **Spread operator + addition of element**: This approach creates a new array by spreading the elements of a Set (in this case) and then adding one more element to it.

**Options compared**:

* Array.from() method vs Spread operator + addition of element
* Two different approaches to create an array from a Set

**Pros and Cons of each approach:**

1. **Array.from() method**:
	* Pros:
		+ More explicit and readable way to create an array from an iterable or array-like object.
		+ Better support for older browsers that don't have the spread operator.
	* Cons:
		+ May be slower due to the overhead of creating a new array.
2. **Spread operator + addition of element**:
	* Pros:
		+ Faster execution, as it only creates a single array and pushes one element to it.
		+ More concise and readable syntax.
	* Cons:
		+ May not be immediately clear to some developers, especially those not familiar with the spread operator.

**Library used:**

In both test cases, a Set object is used. A **Set** is a collection of unique values that can be added, removed, or searched for. It's similar to an array, but it doesn't allow duplicate values. In this benchmark, the Set is populated with numbers from 0 to 99 and then converted to an array using either Array.from() or the spread operator.

**Special JS feature/syntax:**

The spread operator (`...`) is a relatively recent addition to JavaScript (introduced in ECMAScript 2015). It allows you to create a new array by copying elements from an existing iterable. In this benchmark, it's used to create a new array from the Set and then add one more element to it.

**Other alternatives:**

If you want to compare these approaches with other methods, here are some additional options:

* **Array.from() method with initial value**: Instead of using `new Set()` and adding elements manually, you could use `Array.from([0, 1, ..., 99])` to create an array from numbers 0 to 99.
* **Using a library like Lodash or Ramda**: These libraries provide alternative ways to manipulate arrays and Sets, such as creating an array from a Set using their `fromSet()` function.

Keep in mind that these alternatives may not be directly comparable to the original benchmark, as they might introduce additional overhead or changes in performance.

Related benchmarks:

Array.from vs Spread + addition of element (version: 0)

Comparing performance of: Array.from vs Spread

Created: 2 years ago by: Guest

Jump to the latest result

Array.from

Spread

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):