hVosttНу и бред
Зачем так говоришь дарагой а? Совсем авторитет skyANA не уважаешь?
Вот что вызывается в итоге например при string.copy, не спроста же...
Просто компилятору до таких оптимизаций еще далеко.
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// System.Buffer
[ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success), SecurityCritical]
internal unsafe static void Memmove(byte* dest, byte* src, uint len)
{
if (dest - src >= len)
{
switch (len)
{
case 0u:
return;
case 1u:
*dest = *src;
return;
case 2u:
*(short*)dest = *(short*)src;
return;
case 3u:
*(short*)dest = *(short*)src;
dest[2] = src[2];
return;
case 4u:
*(int*)dest = *(int*)src;
return;
case 5u:
*(int*)dest = *(int*)src;
dest[4] = src[4];
return;
case 6u:
*(int*)dest = *(int*)src;
*(short*)(dest + 4) = *(short*)(src + 4);
return;
case 7u:
*(int*)dest = *(int*)src;
*(short*)(dest + 4) = *(short*)(src + 4);
dest[6] = src[6];
return;
case 8u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
return;
case 9u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
dest[8] = src[8];
return;
case 10u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(short*)(dest + 8) = *(short*)(src + 8);
return;
case 11u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(short*)(dest + 8) = *(short*)(src + 8);
dest[10] = src[10];
return;
case 12u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + 8) = *(int*)(src + 8);
return;
case 13u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + 8) = *(int*)(src + 8);
dest[12] = src[12];
return;
case 14u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + 8) = *(int*)(src + 8);
*(short*)(dest + 12) = *(short*)(src + 12);
return;
case 15u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + 8) = *(int*)(src + 8);
*(short*)(dest + 12) = *(short*)(src + 12);
dest[14] = src[14];
return;
case 16u:
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + 8) = *(int*)(src + 8);
*(int*)(dest + 12) = *(int*)(src + 12);
return;
default:
if (len < 512u)
{
if ((dest & 3) != 0)
{
if ((dest & 1) != 0)
{
*dest = *src;
src++;
dest++;
len -= 1u;
if ((dest & 2) == 0)
{
goto IL_1DA;
}
}
*(short*)dest = *(short*)src;
src += 2;
dest += 2;
len -= 2u;
}
IL_1DA:
for (uint num = len / 16u; num > 0u; num -= 1u)
{
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
*(int*)(dest + (IntPtr)2 * 4) = *(int*)(src + (IntPtr)2 * 4);
*(int*)(dest + (IntPtr)3 * 4) = *(int*)(src + (IntPtr)3 * 4);
dest += 16;
src += 16;
}
if ((len & 8u) != 0u)
{
*(int*)dest = *(int*)src;
*(int*)(dest + 4) = *(int*)(src + 4);
dest += 8;
src += 8;
}
if ((len & 4u) != 0u)
{
*(int*)dest = *(int*)src;
dest += 4;
src += 4;
}
if ((len & 2u) != 0u)
{
*(short*)dest = *(short*)src;
dest += 2;
src += 2;
}
if ((len & 1u) != 0u)
{
*dest = *src;
}
return;
}
break;
}
}
Buffer._Memmove(dest, src, len);
}
