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

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
new Uint16Array()
Uint16Array.from()

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.5 Safari/605.1.15

Browser/OS: Safari 16 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
new Uint16Array()	5892583.5 Ops/sec
Uint16Array.from()	1466430.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**What is being tested?**

MeasureThat.net is testing two approaches for creating a new Uint16Array object:

1. `new Uint16Array()`: This approach creates a new Uint16Array object using the traditional constructor syntax.
2. `Uint16Array.from([1, 2, 3])`: This approach uses the `from()` method to create a new Uint16Array object from an array.

**Options compared**

The two approaches are being compared in terms of their performance. The test is trying to determine which approach is faster and more efficient.

**Pros and Cons of each approach:**

1. **new Uint16Array()**:
	* Pros: This approach is widely supported and has been around for a long time, making it a familiar choice for many developers.
	* Cons: It may not be as performant as the `from()` method, especially for large arrays.
2. **Uint16Array.from([1, 2, 3])**:
	* Pros: This approach is often faster and more efficient than the traditional constructor syntax, especially for large arrays. It's also a relatively new feature that's gained popularity in recent years.
	* Cons: It may not be supported by older browsers or versions of JavaScript.

**Library**

The `Uint16Array.from()` method uses the ECMAScript Standard Library, specifically the `from()` method defined in ECMAScript 2015 (ES6).

**Special JS feature/syntax**

There is no special JavaScript feature or syntax being tested here. The focus is solely on comparing the performance of two different approaches for creating a new Uint16Array object.

**Other alternatives**

While not explicitly mentioned in the benchmark, other alternatives for creating Uint16Array objects might include:

* Using `new Int8Array()` and then casting it to `Uint16Array` using the `view` property.
* Using a library like Fastify or Bun that provides optimized versions of these methods.

It's worth noting that the choice of approach ultimately depends on the specific use case and requirements. If you need to create a large number of Uint16Array objects, the `from()` method might be a better choice for performance reasons. However, if you're working with smaller arrays or legacy browsers, the traditional constructor syntax might still be a good option.

Related benchmarks:

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

Comparing performance of: new Uint16Array() vs Uint16Array.from()

Created: 4 years ago by: Registered User

Jump to the latest result

new Uint16Array()

Uint16Array.from()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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