Benchmark: hex to array buffer

Script Preparation code:

var hexVal = 'ed0c356af33bb022afe7c5f8557ad89c';

function hexToArrayBuffer(hex) {
	return new Uint8Array(hex.match(/[\da-f]{2}/gi).map((h) => {
		return parseInt(h, 16);
	})).buffer;
}

function hexStringToUint8Array(hexString) {
    var arrayBuffer = new Uint8Array(hexString.length / 2);
    for (var i = 0; i < hexString.length; i += 2) {
        var byteValue = parseInt(hexString.substr(i, 2), 16);
        arrayBuffer[i / 2] = byteValue;
    }
    return arrayBuffer;
}

Tests:

regex match
hexToArrayBuffer(hexVal)
parseInt 16
hexStringToUint8Array(hexVal)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex match
parseInt 16

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Windows

View result in a separate tab

Test name	Executions per second
regex match	403481.5 Ops/sec
parseInt 16	738427.1 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 its components.

**Benchmark Definition JSON**

The benchmark definition JSON contains information about the test case, including:

* `Name`: The name of the test case.
* `Description`: A brief description of what the test case is trying to measure.
* `Script Preparation Code`: A JavaScript code snippet that sets up the test case. This includes the `hexToArrayBuffer` and `hexStringToUint8Array` functions, which are used to convert hexadecimal strings to Uint8Arrays.
* `Html Preparation Code`: An empty string, indicating that no HTML preparation code is required for this benchmark.

**Individual Test Cases**

The benchmark definition JSON also contains two individual test cases:

* The first test case measures the performance of converting a hexadecimal string to an array buffer using the `hexToArrayBuffer` function.
* The second test case measures the performance of converting a hexadecimal string to a Uint8Array using the `parseInt` function with base 16 (i.e., `parseInt(16)`).

**Options Compared**

The two test cases compare different approaches for converting hexadecimal strings to arrays or Uint8Arrays:

1. `hexToArrayBuffer`: This approach uses a custom function to convert the hexadecimal string to an array buffer.
2. `parseInt 16`: This approach uses the built-in `parseInt` function with base 16 (i.e., `parseInt(16)`).

**Pros and Cons**

Here are some pros and cons of each approach:

* `hexToArrayBuffer`:
	+ Pros: Customizable, allows for more control over the conversion process.
	+ Cons: May be slower than built-in functions due to the overhead of custom function calls.
* `parseInt 16`:
	+ Pros: Built-in function is likely to be faster and more efficient.
	+ Cons: Limited control over the conversion process.

**Library Used**

There is no explicit library used in the benchmark definition JSON. However, the `Uint8Array` class is a built-in JavaScript object, and the `parseInt` function with base 16 is also a built-in function.

**Special JS Feature/Syntax**

No special JavaScript features or syntax are used in this benchmark.

**Other Alternatives**

Other alternatives for converting hexadecimal strings to arrays or Uint8Arrays include:

* Using the `fromHex` method of the `Uint8Array` class (available in some browsers).
* Using a third-party library like `hex-to-array-buffer`.
* Using a native module like `libuv` or `node-ffi` to perform the conversion.

Keep in mind that these alternatives may have different performance characteristics and trade-offs, depending on the specific use case and requirements.

Related benchmarks:

hex to array buffer (version: 0)

convert hex to array buffer

Comparing performance of: regex match vs parseInt 16

Created: one year ago by: Guest

Jump to the latest result

regex match

parseInt 16

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):