Benchmark: Dataview vs Uint8Array - read byte

Script Preparation code:

var size = 1024;
var buffer = new ArrayBuffer(size);
var bytes = new Uint8Array(buffer);
var dv = new DataView(buffer);

for (var i = 0; i < size; i++)
  dv.setUint8(i, Math.ceil(Math.random() * 255));

Tests:

DataView
for (var i = 0; i < size; i++) dv.getUint8(i);
Uint8Array
for (var i = 0; i < size; i++) bytes[i];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
DataView
Uint8Array

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 28 days ago):

LLMs can make mistakes. Check important info.

This benchmark compares the performance of reading byte values from a `DataView` object versus reading them directly from a `Uint8Array`.

**Options Compared:**

* **DataView:** Provides a structured way to access data in an `ArrayBuffer` by its type (e.g., integers, floats). It's particularly useful when you need to perform operations on specific data types within the buffer.
* **Uint8Array:** A typed array specifically designed to hold unsigned 8-bit integers. Accessing individual elements is direct and efficient.

**Pros and Cons:**

| Option | Pros                                      | Cons                                            |
|--------|--------------------------------------------|---------------------------------------------------|
| **DataView** | - Type-safe access                       | - Can be slower for simple byte reads            |
|         | - Supports various data types              |                                                   |
| **Uint8Array** | - Extremely fast direct access to bytes | - Only holds unsigned 8-bit integers             |

**Considerations:**

* **Use Case:** If your primary need is to read individual bytes efficiently, `Uint8Array` will likely be faster.  If you require more complex data manipulation or working with different data types within the `ArrayBuffer`, `DataView` provides a structured approach.
* **Overhead:** `DataView` might introduce some overhead due to its type-checking and abstraction layer compared to the direct access of `Uint8Array`.

**Alternatives:**

* **Other Typed Arrays:**  JavaScript offers various typed arrays like `Int16Array`, `Float32Array`, etc., which might be suitable depending on your data types.

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36

Browser/OS: Chrome 127 on Linux

View result in a separate tab

Test name	Executions per second
DataView	9322.6 Ops/sec
Uint8Array	9048.8 Ops/sec

Related benchmarks:

Dataview vs Uint8Array - read byte (version: 0)

Comparing performance of: DataView vs Uint8Array

Created: 6 years ago by: Guest

Jump to the latest result

DataView

Uint8Array

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated 28 days ago):