Benchmark: Sha256-Hex-Effect

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/sjcl/1.0.6/sjcl.min.js"></script>
<script 
src="https://cdnjs.cloudflare.com/ajax/libs/cryptico/0.0.1343522940/cryptico.min.js"></script>
<script
 src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.9-1/crypto-js.min.js"></script>

Script Preparation code:

var data = new Uint32Array(1024);
  window.crypto.getRandomValues(data);
  var dataBuffer = new Uint8Array(data);
  data = String.fromCharCode.apply(null, dataBuffer);
  
  
  // src: https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/digest
  function hex(buffer) {
    var hexCodes = [];
    var view = new DataView(buffer);
    for (var i = 0; i < view.byteLength; i += 4) {
      // Using getUint32 reduces the number of iterations needed (we process 4 bytes each time)
      var value = view.getUint32(i)
      // toString(16) will give the hex representation of the number without padding
      var stringValue = value.toString(16)
      // We use concatenation and slice for padding
      var padding = '00000000'
      var paddedValue = (padding + stringValue).slice(-padding.length)
      hexCodes.push(paddedValue);
    }
  
    // Join all the hex strings into one
    return hexCodes.join("");
  }

Tests:

window.crypto-NoHex
crypto.subtle.digest("SHA-256", dataBuffer ).then(function (hash) {console.log(hash);});
window.crypto-Hex
crypto.subtle.digest("SHA-256", dataBuffer ).then(function (hash) {console.log(hex(hash));});

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
window.crypto-NoHex
window.crypto-Hex

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):

LLMs can make mistakes. Check important info.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks, specifically focusing on cryptographic primitives like SHA-256. The provided benchmark definition and test cases measure the performance of the Web Cryptography API (Web Crypto) in generating and processing SHA-256 hashes.

**Script Preparation Code Analysis**

The script preparation code generates a random data buffer using `window.crypto.getRandomValues()` and converts it to a string using `String.fromCharCode.apply(null, dataBuffer)`. The purpose of this code is to create a test input for the Web Crypto API. Specifically, it:

1. Generates 1024 random integers using `window.crypto.getRandomValues()`.
2. Converts each integer to a hexadecimal string.
3. Concatenates these strings with padding to ensure they have a fixed length.

**Library Usage**

The script uses three JavaScript libraries:

1. **sjcl**: The Small JavaScript Cryptography Library (sjcl) is used for its `Digest` class, which provides an implementation of the SHA-256 algorithm. However, in this benchmark, sjcl is not actually used; instead, it's imported to show that other alternatives can be used.
2. **cryptico**: This library provides a polyfill for Web Crypto, but it's not actively maintained and has known security vulnerabilities. In this benchmark, cryptico is included as an alternative option, but its use is discouraged due to these concerns.
3. **crypto-js**: A popular JavaScript library for cryptographic primitives, including SHA-256. It's used in the `hex` function to convert the hash output from a binary format to a hexadecimal string.

**Options Comparison**

The benchmark compares two approaches:

1. **window.crypto-NoHex**: This option uses the Web Crypto API without converting the hash output to a hexadecimal string.
2. **window.crypto-Hex**: This option converts the hash output to a hexadecimal string using `crypto-js`.

**Pros and Cons of Each Approach**

**window.crypto-NoHex**

Pros:

* Faster performance, as it avoids the additional conversion step
* More accurate results, as it doesn't introduce padding or truncation

Cons:

* May not be compatible with all platforms or browsers that don't support hexadecimal string conversion
* Requires manual handling of binary data, which can be error-prone

**window.crypto-Hex**

Pros:

* Easier to work with binary data, as it's converted to a human-readable format
* More platform-independent, as most browsers and platforms support hexadecimal strings

Cons:

* Slower performance, due to the additional conversion step
* May introduce padding or truncation errors, depending on the input data length

**Other Alternatives**

In addition to these options, other alternatives could be considered, such as using a custom implementation of SHA-256 or another cryptographic library like `webcrypto`. However, the Web Crypto API is widely supported and provides a convenient way to perform cryptographic operations in JavaScript.

**Special JS Features or Syntax**

None are explicitly mentioned in this benchmark.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Firefox/68.0

Browser/OS: Firefox 68 on Mac OS X 10.14

View result in a separate tab

Test name	Executions per second
window.crypto-NoHex	5333.3 Ops/sec
window.crypto-Hex	5156.7 Ops/sec

Related benchmarks:

Sha256-Hex-Effect (version: 0)

Comparing performance of: window.crypto-NoHex vs window.crypto-Hex

Created: 5 years ago by: Guest

Jump to the latest result

window.crypto-NoHex

window.crypto-Hex

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):