Benchmark: Uint16Array.from() vs new Uint16Array()

Tests:

Array.from
var foo = new Uint16Array([1,2,3]);
Spread
var foo = Uint16Array.from([1,2,3]);

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:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.from	4551088.0 Ops/sec
Spread	4116224.2 Ops/sec

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 and explain what is being tested on MeasureThat.net.

**Benchmark Definition**

The benchmark definition states that we're comparing two approaches for creating a `Uint16Array`:

1. `new Uint16Array([1,2,3])`
2. `Uint16Array.from([1,2,3])`

These are the only two methods being compared in this specific benchmark.

**Options Compared**

The options being compared are:

* **Method 1: new Uint16Array()**
	+ Pros:
		- Creates a new array instance with a fixed size of 3 (the length of the provided array).
		- Allows for easy access to individual elements using indexing (`foo[0]`, `foo[1]`, etc.).
	+ Cons:
		- Requires manual memory management, as the array's length and contents must be explicitly set.
		- May lead to slower performance compared to other methods, especially for large arrays.
* **Method 2: Uint16Array.from()**
	+ Pros:
		- Creates a new array instance with a dynamic size based on the provided array (in this case, an array of length 3).
		- Allows for more concise code and easier access to individual elements using bracket notation (`foo[0]`, `foo[1]`, etc.).
	+ Cons:
		- May lead to slower performance compared to other methods, especially for large arrays.
		- Can be less efficient due to the overhead of creating a new array instance.

**Library Used**

In both test cases, the library being used is not explicitly mentioned. However, based on the code examples provided, it appears that this benchmark is using the latest version of JavaScript (ECMAScript) and does not require any external libraries.

**Special JS Features/Syntax**

There are no special JavaScript features or syntaxes being tested in these benchmarks. The code examples use standard ECMAScript syntax for creating arrays and accessing their elements.

**Other Alternatives**

Some alternative approaches to creating `Uint16Array` instances include:

* Using the `Array.from()` method with an array constructor function, like this: `new Uint16Array().fill(0).map((_, i) => [1, 2, 3][i])`
* Using a library like Lodash or Ramda to create arrays and manipulate their elements
* Using a different type of array, such as a typed array (e.g., `Int32Array`, `Float64Array`)

Related benchmarks:

Uint16Array.from() vs new Uint16Array() (version: 0)

Comparing performance of: Array.from vs Spread

Created: 6 years ago by: Guest

Jump to the latest result

Array.from

Spread

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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