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Code Issues Releases Activity

Optimized HexStringToByteArray method using spans for better performance

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This commit is contained in:
bird_egop 2025-04-13 17:07:09 +03:00
parent 2cdd9f1e83
commit 3f4b9a8547
1 changed files with 11 additions and 4 deletions
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15
X86DisassemblerTests/RawFromFileDisassemblyTests.cs
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@ -125,15 +125,22 @@ public class RawFromFileDisassemblyTests(ITestOutputHelper output)
/// <returns>The byte array</returns>
private static byte[] HexStringToByteArray(string hex)
{
// Remove any non-hex characters
// Remove any non-hex characters if present
hex = hex.Replace(" ", "").Replace("-", "");
// Create a byte array
byte[] bytes = new byte[hex.Length / 2];
// Convert each pair of hex characters to a byte
for (int i = 0; i < hex.Length; i += 2)
// Convert each pair of hex characters to a byte using spans for better performance
ReadOnlySpan<char> hexSpan = hex.AsSpan();
for (int i = 0; i < hexSpan.Length; i += 2)
{
bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
// Parse two characters at a time using spans
if (!byte.TryParse(hexSpan.Slice(i, 2), NumberStyles.HexNumber, CultureInfo.InvariantCulture, out bytes[i / 2]))
{
throw new FormatException($"Invalid hex string at position {i}: {hexSpan.Slice(i, 2).ToString()}");
}
}
return bytes;