Benchmark: Uint8Array creation

Script Preparation code:

var buffer = new ArrayBuffer(240);
for (var c=0;c<buffer.byteLength;c++) {
  buffer[c] = c;
}

Tests:

New
var test = new Uint8Array(buffer);
From
var test = Uint8Array.from(buffer);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
New
From

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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 benchmark data and explain what's being tested, compared, and discussed.

**Benchmark Definition:**
The benchmark is testing the creation of `Uint8Array` objects using two different methods:

1. **New**: Creating a new instance of `Uint8Array` by calling the constructor with an existing `ArrayBuffer` object as an argument.
2. **From**: Using the `from()` method to create a new `Uint8Array` object from an existing `ArrayBuffer` object.

**Options Compared:**
The benchmark is comparing two approaches:

1. Creating a new instance of `Uint8Array` using the constructor (New).
2. Using the `from()` method to create a new `Uint8Array` object (From).

**Pros and Cons:**

* **New**: This approach has an advantage in terms of performance, as it avoids the overhead of creating a new function call and binding the array's properties.
* **From**: However, this approach may have a slight performance penalty due to the additional function call and potential overhead of binding the array's properties. Additionally, some browsers might optimize `from()` calls more aggressively than constructor calls.

**Other Considerations:**

* The benchmark assumes that the `ArrayBuffer` object is already in scope, which is likely the case when running this test in a browser environment.
* The use of `var buffer = new ArrayBuffer(240);` as part of the script preparation code creates an `ArrayBuffer` object with a fixed size. This might be relevant if you're using a similar approach in your own benchmarking or performance testing.

**Library/Library Purpose:**
In this case, there is no external library being used specifically for this benchmark. However, some JavaScript implementations (e.g., V8) use internal libraries and optimizations to manage `ArrayBuffer` objects and related data structures.

**Special JS Feature/Syntax:**
There are no special features or syntax mentioned in the provided JSON benchmark data.

**Alternative Approaches:**

* If you need to create a large number of `Uint8Array` objects, using an array literal (e.g., `[new Uint8Array(240); ...]`) might be more efficient than creating them individually using the constructor.
* Some browsers provide additional APIs or optimizations for working with arrays and buffers, such as WebAssembly's buffer-like interfaces or Node.js's `Buffer` class.

Related benchmarks:

Uint8Array creation (version: 0)

Comparing performance of: New vs From

Created: 6 years ago by: Guest

Jump to the latest result

New

From

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):