Benchmark: Little array Spread vs Array from

Tests:

Array from
var fooSet = new Set(); for(var i=0;i<10;i++) { fooSet.add(i); } var other = Array.from(fooSet);
Spread
var fooSet = new Set(); for(var i=0;i<100;i++) { fooSet.add(i); } var other = [...fooSet];

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

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what's being tested.

**Benchmark Definition**
The website "MeasureThat.net" provides a JSON representation of a JavaScript microbenchmark. In this case, there is only one benchmark definition:

```
{
    "Name": "Little array Spread vs Array from",
    "Description": "Same bench as arrayfrom-vs-spread with little array",
    "Script Preparation Code": null,
    "Html Preparation Code": null
}
```

This benchmark is testing the performance difference between two methods to create an array from a Set:

1. `Array.from()`: This method was introduced in ECMAScript 2015 (ES6) as a way to create an array from any iterable, including Sets.
2. Spread syntax (`...`): Introduced in ECMAScript 2015 (ES6), this syntax allows you to spread the elements of a Set or other iterable into a new array.

**Test Cases**
There are two individual test cases:

1. **"Array from"**

Benchmark Definition:
```javascript
var fooSet = new Set();
for(var i=0;i<10;i++) {
  fooSet.add(i);
}
var other = Array.from(fooSet);
```

This test case creates a Set with 10 elements and then uses `Array.from()` to create an array from the Set.

2. **"Spread"**

Benchmark Definition:
```javascript
var fooSet = new Set();
for(var i=0;i<100;i++) {
  fooSet.add(i);
}
var other = [...fooSet];
```

This test case creates a Set with 100 elements and then uses spread syntax (`...`) to create an array from the Set.

**Comparison**
The benchmark is comparing the performance of these two methods: `Array.from()` and spread syntax (`...`).

**Pros and Cons**

* **`Array.from()`**:
	+ Pros: This method is more explicit and can be more readable, especially for developers who are not familiar with spread syntax.
	+ Cons: It may require additional imports or using the `es6.arrayFrom` polyfill in older browsers.
* **Spread syntax (`...`)**:
	+ Pros: Spread syntax is concise and easy to read. It's also supported by most modern browsers without any additional imports.
	+ Cons: Some developers might find it less readable than using `Array.from()`.

**Library/Extension**
Neither of these methods relies on a specific library or extension. They are part of the ECMAScript standard (ES6).

**Special JS Feature/Syntax**
No special JavaScript features or syntax are used in this benchmark. Both methods are well-supported by modern browsers and do not require any special compiler settings.

**Alternatives**
If you're interested in alternative methods for creating an array from a Set, here are a few options:

* **`set.values()`**: This method returns an iterator over the elements of the Set. You can use `Array.from()` or spread syntax to convert it to an array.
* **Manual iteration**: You can also manually iterate over the elements of the Set using a `for...of` loop.

Keep in mind that these alternatives might not be as concise or readable as using `Array.from()` or spread syntax, but they can provide more control over the creation process.

Related benchmarks:

Little array Spread vs Array from (version: 0)

Same bench as arrayfrom-vs-spread with little array

Comparing performance of: Array from vs Spread

Created: 4 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):