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speed up pkm crypt

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GetBytes returns an array that is immediately discarded (GC pressure)
reduces overhead when loading large pkm collections from save files
(shaved off a couple seconds from my loading from 200+ bak saves)

could probably go faster with unsafe code to r/w ushort directly
then again im profiling under debug but i'd assume the improvements made
actually do improve speed for release builds
This commit is contained in:
Kurt 2017-12-28 23:24:12 -08:00
parent dccad6c2f4
commit 1d405d63c8
1 changed files with 19 additions and 8 deletions
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27
PKHeX.Core/PKM/PKX.cs
View file

@ -1,6 +1,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
namespace PKHeX.Core
{
@ -410,7 +411,7 @@ namespace PKHeX.Core
// Decrypt Blocks with RNG Seed
for (int i = 8; i < 232; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(pkx, i) ^ LCRNG(ref seed) >> 16)).CopyTo(pkx, i);
Crypt(pkx, ref seed, i);
// Deshuffle
pkx = ShuffleArray(pkx, sv);
@ -419,7 +420,7 @@ namespace PKHeX.Core
seed = pv;
if (pkx.Length <= 232) return pkx;
for (int i = 232; i < 260; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(pkx, i) ^ LCRNG(ref seed) >> 16)).CopyTo(pkx, i);
Crypt(pkx, ref seed, i);
return pkx;
}
@ -442,7 +443,7 @@ namespace PKHeX.Core
// Encrypt Blocks with RNG Seed
for (int i = 8; i < 232; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(ekx, i) ^ LCRNG(ref seed) >> 16)).CopyTo(ekx, i);
Crypt(ekx, ref seed, i);
// If no party stats, return.
if (ekx.Length <= 232) return ekx;
@ -450,7 +451,7 @@ namespace PKHeX.Core
// Encrypt the Party Stats
seed = pv;
for (int i = 232; i < 260; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(ekx, i) ^ LCRNG(ref seed) >> 16)).CopyTo(ekx, i);
Crypt(ekx, ref seed, i);
return ekx;
}
@ -649,7 +650,7 @@ namespace PKHeX.Core
// Decrypt Blocks with RNG Seed
for (int i = 8; i < 136; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(pkm, i) ^ LCRNG(ref seed) >> 16)).CopyTo(pkm, i);
Crypt(pkm, ref seed, i);
// Deshuffle
pkm = ShuffleArray45(pkm, sv);
@ -658,7 +659,7 @@ namespace PKHeX.Core
seed = pv;
if (pkm.Length <= 136) return pkm;
for (int i = 136; i < pkm.Length; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(pkm, i) ^ LCRNG(ref seed) >> 16)).CopyTo(pkm, i);
Crypt(pkm, ref seed, i);
return pkm;
}
@ -682,7 +683,7 @@ namespace PKHeX.Core
// Encrypt Blocks with RNG Seed
for (int i = 8; i < 136; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(ekm, i) ^ LCRNG(ref seed) >> 16)).CopyTo(ekm, i);
Crypt(ekm, ref seed, i);
// If no party stats, return.
if (ekm.Length <= 136) return ekm;
@ -690,12 +691,22 @@ namespace PKHeX.Core
// Encrypt the Party Stats
seed = pv;
for (int i = 136; i < ekm.Length; i += 2)
BitConverter.GetBytes((ushort)(BitConverter.ToUInt16(ekm, i) ^ LCRNG(ref seed) >> 16)).CopyTo(ekm, i);
Crypt(ekm, ref seed, i);
// Done
return ekm;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private static void Crypt(byte[] data, ref uint seed, int i)
{
var val = data[i] | data[i + 1] << 8;
seed = 0x41C64E6D * seed + 0x00006073;
val ^= (ushort)(seed >> 16);
data[i] = (byte)val;
data[i + 1] = (byte)(val >> 8);
}
/// <summary>
/// Gets the Unown Forme ID from PID.
/// </summary>