Benchmark: spdread operator

Script Preparation code:

let l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7]);
l = [...l]

Tests:

Array.from
let l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7]); let r = Array.from(l);
Spread operator
let l = new Set([1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7]); let r = [...l];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
Spread operator

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 and explain what's being tested.

**Benchmark Definition**

The `Script Preparation Code` section defines an initial JavaScript array with duplicate values. The goal of this code is to create a set of unique elements, which will be used as input for the tests.

**Test Cases**

There are two test cases:

1. **Array.from**
This test case uses the `Array.from()` method to convert the set created in the `Script Preparation Code` section into an array.
2. **Spread Operator**
This test case uses the spread operator (`...`) to convert the same set into an array.

**Library and Purpose**

In both test cases, the library used is the JavaScript built-in `Set` object, which allows you to store unique values. The purpose of using a set here is to create an initial collection with duplicate elements, allowing us to measure the performance of different methods for converting it into an array.

**Special JS Feature or Syntax**

The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as a new way to create arrays from iterables. It's a shorthand way to convert an iterable object (like a set or an array) into an array.

**Pros and Cons of Different Approaches**

Here are some pros and cons of using the spread operator versus `Array.from()`:

* **Spread Operator (ES6+)**:
	+ Pros: concise, easy to read, works with modern browsers and Node.js.
	+ Cons: may not be supported in older browsers or environments.
* **Array.from()**:
	+ Pros: widely supported, stable API, has been around since ES5.
	+ Cons: can be less readable than the spread operator.

**Other Considerations**

When creating benchmarks like this, it's essential to consider factors such as:

* Hardware and software configuration
* Environment-specific differences (e.g., browser cache, Node.js version)
* Optimizations or workarounds that might affect performance

In terms of alternatives, other methods for converting sets into arrays include using `Array.from()` with a callback function (`Array.from(array, () => { ... })`) or using a library like Lodash's `toPairs()` method.

Keep in mind that the choice of approach ultimately depends on the specific requirements and constraints of your project.

Related benchmarks:

spdread operator (version: 0)

Comparing performance of: Array.from vs Spread operator

Created: 7 years ago by: Guest

Jump to the latest result

Array.from

Spread operator

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):