Use Convert.ToHexString (2x faster, 1/2 memory usage)

Author: bkoelman

src/JsonApiDotNetCore/Serialization/Response/FingerprintGenerator.cs

@@ -7,13 +7,6 @@ namespace JsonApiDotNetCore.Serialization.Response;
 internal sealed class FingerprintGenerator : IFingerprintGenerator
 {
     private static readonly byte[] Separator = "|"u8.ToArray();
-    private static readonly uint[] LookupTable = Enumerable.Range(0, 256).Select(ToLookupEntry).ToArray();
-
-    private static uint ToLookupEntry(int index)
-    {
-        string hex = index.ToString("X2");
-        return hex[0] + ((uint)hex[1] << 16);
-    }
 
     /// <inheritdoc />
     public string Generate(IEnumerable<string> elements)
@@ -30,22 +23,6 @@ public string Generate(IEnumerable<string> elements)
         }
 
         byte[] hash = hasher.GetHashAndReset();
-        return ByteArrayToHex(hash);
-    }
-
-    private static string ByteArrayToHex(byte[] bytes)
-    {
-        // https://stackoverflow.com/questions/311165/how-do-you-convert-a-byte-array-to-a-hexadecimal-string-and-vice-versa
-
-        char[] buffer = new char[bytes.Length * 2];
-
-        for (int index = 0; index < bytes.Length; index++)
-        {
-            uint value = LookupTable[bytes[index]];
-            buffer[2 * index] = (char)value;
-            buffer[2 * index + 1] = (char)(value >> 16);
-        }
-
-        return new string(buffer);
+        return Convert.ToHexString(hash);
     }
 }