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Performance improvement in ReverseHexString

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ds5678 2025-07-17 03:56:51 -07:00
parent e33d1b9e23
commit 964da3c1bc
1 changed files with 35 additions and 37 deletions
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72
Source/AssetRipper.Yaml/Extensions/ReverseHexString.cs
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@ -1,6 +1,4 @@
using System.Buffers.Binary;
using System.Diagnostics;
using System.Numerics;
using System.Diagnostics;
using System.Runtime.CompilerServices;
namespace AssetRipper.Yaml.Extensions;
@ -14,49 +12,49 @@ internal static class ReverseHexString
{
if (typeof(T) == typeof(byte) || typeof(T) == typeof(sbyte))
{
byte b = Unsafe.As<T, byte>(ref value);
buffer[0] = NybbleToLowercaseHexCharacter(b >> 4);
buffer[1] = NybbleToLowercaseHexCharacter(b & 0x0F);
byte x = Unsafe.As<T, byte>(ref value);
buffer[0] = NybbleToLowercaseHexCharacter(x >> 4);
buffer[1] = NybbleToLowercaseHexCharacter(x & 0x0F);
}
else if (typeof(T) == typeof(short) || typeof(T) == typeof(ushort) || typeof(T) == typeof(char))
{
ushort reverse = BinaryPrimitives.ReverseEndianness(Unsafe.As<T, ushort>(ref value));
buffer[0] = NybbleToLowercaseHexCharacter(reverse >> 12);
buffer[1] = NybbleToLowercaseHexCharacter((reverse >> 8) & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter((reverse >> 4) & 0x0F);
buffer[3] = NybbleToLowercaseHexCharacter(reverse & 0x0F);
ushort x = Unsafe.As<T, ushort>(ref value);
buffer[0] = NybbleToLowercaseHexCharacter((x >> 4) & 0x0F);
buffer[1] = NybbleToLowercaseHexCharacter(x & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter(x >> 12);
buffer[3] = NybbleToLowercaseHexCharacter((x >> 8) & 0x0F);
}
else if (typeof(T) == typeof(int) || typeof(T) == typeof(uint))
{
int reverse = BinaryPrimitives.ReverseEndianness(Unsafe.As<T, int>(ref value));
buffer[0] = NybbleToLowercaseHexCharacter(reverse >> 28);
buffer[1] = NybbleToLowercaseHexCharacter((reverse >> 24) & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter((reverse >> 20) & 0x0F);
buffer[3] = NybbleToLowercaseHexCharacter((reverse >> 16) & 0x0F);
buffer[4] = NybbleToLowercaseHexCharacter((reverse >> 12) & 0x0F);
buffer[5] = NybbleToLowercaseHexCharacter((reverse >> 8) & 0x0F);
buffer[6] = NybbleToLowercaseHexCharacter((reverse >> 4) & 0x0F);
buffer[7] = NybbleToLowercaseHexCharacter(reverse & 0x0F);
int x = Unsafe.As<T, int>(ref value);
buffer[0] = NybbleToLowercaseHexCharacter((x >> 4) & 0x0F);
buffer[1] = NybbleToLowercaseHexCharacter(x & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter((x >> 12) & 0x0F);
buffer[3] = NybbleToLowercaseHexCharacter((x >> 8) & 0x0F);
buffer[4] = NybbleToLowercaseHexCharacter((x >> 20) & 0x0F);
buffer[5] = NybbleToLowercaseHexCharacter((x >> 16) & 0x0F);
buffer[6] = NybbleToLowercaseHexCharacter(x >> 28);
buffer[7] = NybbleToLowercaseHexCharacter((x >> 24) & 0x0F);
}
else if (typeof(T) == typeof(long) || typeof(T) == typeof(ulong))
{
long reverse = BinaryPrimitives.ReverseEndianness(Unsafe.As<T, long>(ref value));
buffer[0] = NybbleToLowercaseHexCharacter(reverse >> 60);
buffer[1] = NybbleToLowercaseHexCharacter((reverse >> 56) & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter((reverse >> 52) & 0x0F);
buffer[3] = NybbleToLowercaseHexCharacter((reverse >> 48) & 0x0F);
buffer[4] = NybbleToLowercaseHexCharacter((reverse >> 44) & 0x0F);
buffer[5] = NybbleToLowercaseHexCharacter((reverse >> 40) & 0x0F);
buffer[6] = NybbleToLowercaseHexCharacter((reverse >> 36) & 0x0F);
buffer[7] = NybbleToLowercaseHexCharacter((reverse >> 32) & 0x0F);
buffer[8] = NybbleToLowercaseHexCharacter((reverse >> 28) & 0x0F);
buffer[9] = NybbleToLowercaseHexCharacter((reverse >> 24) & 0x0F);
buffer[10] = NybbleToLowercaseHexCharacter((reverse >> 20) & 0x0F);
buffer[11] = NybbleToLowercaseHexCharacter((reverse >> 16) & 0x0F);
buffer[12] = NybbleToLowercaseHexCharacter((reverse >> 12) & 0x0F);
buffer[13] = NybbleToLowercaseHexCharacter((reverse >> 8) & 0x0F);
buffer[14] = NybbleToLowercaseHexCharacter((reverse >> 4) & 0x0F);
buffer[15] = NybbleToLowercaseHexCharacter(reverse & 0x0F);
long x = Unsafe.As<T, long>(ref value);
buffer[0] = NybbleToLowercaseHexCharacter((x >> 4) & 0x0F);
buffer[1] = NybbleToLowercaseHexCharacter(x & 0x0F);
buffer[2] = NybbleToLowercaseHexCharacter((x >> 12) & 0x0F);
buffer[3] = NybbleToLowercaseHexCharacter((x >> 8) & 0x0F);
buffer[4] = NybbleToLowercaseHexCharacter((x >> 20) & 0x0F);
buffer[5] = NybbleToLowercaseHexCharacter((x >> 16) & 0x0F);
buffer[6] = NybbleToLowercaseHexCharacter((x >> 28) & 0x0F);
buffer[7] = NybbleToLowercaseHexCharacter((x >> 24) & 0x0F);
buffer[8] = NybbleToLowercaseHexCharacter((x >> 36) & 0x0F);
buffer[9] = NybbleToLowercaseHexCharacter((x >> 32) & 0x0F);
buffer[10] = NybbleToLowercaseHexCharacter((x >> 44) & 0x0F);
buffer[11] = NybbleToLowercaseHexCharacter((x >> 40) & 0x0F);
buffer[12] = NybbleToLowercaseHexCharacter((x >> 52) & 0x0F);
buffer[13] = NybbleToLowercaseHexCharacter((x >> 48) & 0x0F);
buffer[14] = NybbleToLowercaseHexCharacter(x >> 60);
buffer[15] = NybbleToLowercaseHexCharacter((x >> 56) & 0x0F);
}
else if (typeof(T) == typeof(float))
{