Benchmark: array buffer to hex conversion 2

Script Preparation code:

var saltVal = crypto.getRandomValues(new Uint8Array(16));

function arrayBufferToHexString(bytes) {
    bytes = new Uint8Array(bytes);
    var hex = [];
    for (let i = 0; i < bytes.length; i++) {
        hex[i] = ("0" + bytes[i].toString(16)).slice(-2);
    }
    return hex.join("");
}

function bytesToHexString(bytes) {
    bytes = new Uint8Array(bytes);
    var hexBytes = [];
    for (var i = 0; i < bytes.length; i++) {
        hexBytes.push(("0" + bytes[i].toString(16)).slice(-2));
    }
    return hexBytes.join("");
}

Tests:

directly set
arrayBufferToHexString(saltVal);
push values
bytesToHexString(saltVal)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
directly set
push values

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/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
directly set	1738722.5 Ops/sec
push values	1542617.1 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark JSON and explain what's being tested, compared, and other considerations.

**Benchmark Definition**

The benchmark definition is a JavaScript function that converts an `ArrayBuffer` to a hexadecimal string using two different approaches:

1. `arrayBufferToHexString(bytes)`: This function takes an `ArrayBuffer` as input, creates a new `Uint8Array` from it, and then iterates over the array to convert each byte to a hexadecimal string.
2. `bytesToHexString(bytes)`: This function is similar to the first one but uses the `push()` method to add the converted bytes to an array instead of directly assigning them.

**Comparison**

The benchmark compares the performance of these two approaches on converting an `ArrayBuffer` to a hexadecimal string. The comparison is done by executing each function with a salt value generated using the `crypto.getRandomValues()` function, and measuring the execution time for each case.

**Pros and Cons**

1. **Direct assignment (`arrayBufferToHexString(bytes)`)**:
	* Pros: May be faster due to direct assignment of converted bytes.
	* Cons: May consume more memory if the array is large.
2. **Push values (`bytesToHexString(bytes)`)**:
	* Pros: May be safer and more memory-efficient, as it avoids direct assignment of large arrays.
	* Cons: May be slower due to the overhead of `push()` method.

**Library**

The benchmark uses the `crypto` library, which is a built-in Node.js module for cryptographic functions. In this case, it's used to generate a random salt value using `getRandomValues()`. The `crypto` library provides various features like encryption, decryption, hashing, and randomness generation, making it a useful tool for security-related tasks.

**Special JS feature/syntax**

There are no special JavaScript features or syntaxes mentioned in the benchmark definition. However, it's worth noting that the use of `let` and `var` keywords is consistent throughout the code, which suggests that this benchmark was written to demonstrate the difference between these two keyword declarations.

**Alternatives**

If you want to measure the performance of similar operations, you might consider using other JavaScript functions or approaches, such as:

* Using `buffer.toString()` method (which is a built-in method for converting buffers to strings).
* Implementing a custom binary-to-hexadecimal conversion function.
* Comparing the performance of different libraries or frameworks that provide similar functionality.

Keep in mind that these alternatives might not be directly comparable to the original benchmark, as they may have different use cases or assumptions about the input data.

Related benchmarks:

array buffer to hex conversion 2 (version: 0)

convert array buffer to hex

Comparing performance of: directly set vs push values

Created: 2 years ago by: Guest

Jump to the latest result

directly set

push values

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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