Run results for: array buffer to hex conversion 3 methods

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Linux

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
directly set	2439992.5 Ops/sec
push values	4291398.0 Ops/sec
buf2hex()	1953179.2 Ops/sec

Script Preparation code:

var saltVal = crypto.getRandomValues(new Uint8Array(16));

function arrayBufferToHexString(bytes) {
    bytes = new Uint8Array(bytes);
    var hex = new Array(bytes.length);
    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++) {
        var byteString = bytes[i].toString(16);
        if (byteString.length < 2) byteString = "0" + byteString;
        hexBytes.push(byteString);
    }
    return hexBytes.join("");
}

function buf2hex(buffer) { // buffer is an ArrayBuffer
  return [...new Uint8Array(buffer)]
      .map(x => x.toString(16).padStart(2, '0'))
      .join('');
}

Tests:

directly set
arrayBufferToHexString(saltVal);
push values
bytesToHexString(saltVal)
buf2hex()
buf2hex(saltVal)

Run results for: array buffer to hex conversion 3 methods

convert array buffer to hex

directly set

push values

buf2hex()