Benchmark: spread vs ArrayFrom

Script Preparation code:

var array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Tests:

spread
var spread = [...array]
arrayFrom
var from = Array.from(array)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
arrayFrom

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 explain what is being tested.

**Benchmark Overview**

The benchmark compares two approaches to create an array from an existing array: using the spread operator (`...`) and using the `Array.from()` method.

**Options Compared**

There are two options being compared:

1. **Spread Operator (`...`)**: This approach uses the spread operator to create a new array by spreading the elements of the original array into a new array.
2. **Array.from() Method**: This approach uses the `Array.from()` method, which creates a new array from an iterable or an array-like object.

**Pros and Cons**

**Spread Operator (`...`)**

Pros:

* Simple and concise syntax
* Works well with arrays and other iterable objects
* Generally faster than `Array.from()`

Cons:

* May not work as expected with non-array iterables (e.g., sets, maps)
* Can be less readable for complex use cases

**Array.from() Method**

Pros:

* More flexible and robust than the spread operator
* Works well with non-array iterables (e.g., sets, maps)
* Can provide better performance in certain scenarios

Cons:

* Less concise syntax compared to the spread operator
* May be slower than the spread operator for simple array use cases

**Other Considerations**

Both approaches have their strengths and weaknesses. The choice of approach depends on the specific use case and personal preference.

For simple array manipulation, the spread operator is often a better choice due to its concise syntax and generally faster performance. However, when working with non-array iterables or requiring more flexibility, the `Array.from()` method may be a better option.

**Library Used**

In this benchmark, no external libraries are used beyond the built-in JavaScript `Array` and `Set` types.

**Special JS Feature/Syntax**

The spread operator (`...`) is a relatively modern feature introduced in ECMAScript 2015 (ES6). It allows for concise array creation by spreading elements into a new array. The `Array.from()` method, on the other hand, has been part of the JavaScript standard library since ECMAScript 2015 as well.

**Alternatives**

If you're interested in exploring alternative approaches or libraries, some options include:

* Using `Array.prototype.slice()` or `Array.prototype.splice()` to create a new array from an existing one.
* Utilizing third-party libraries like Lodash or Ramda for more complex array manipulation.
* Examining other spread operator variants, such as `slice()` or `reduce()`, which can offer different trade-offs in terms of performance and readability.

Overall, the choice between the spread operator and `Array.from()` depends on your specific use case, personal preference, and the constraints of your project.

Related benchmarks:

spread vs ArrayFrom (version: 0)

Comparing performance of: spread vs arrayFrom

Created: 2 years ago by: Guest

Jump to the latest result

spread

arrayFrom

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):