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VB Tricks (Sdk)
VB Tricks // Sdkr i c h a r dFeb 14, 2004, 10:31pm
John brought this URL to my attention, might be worth reading...
http://www.quadrantwars.com/optimizations.htm strike rapierFeb 15, 2004, 8:43am
Yes I found that quite a while ago, it got an award on Planet Source Code as
well if I remember correctly. Its a very good article, with bots and such I think the main one for people to pick up will be strings, for comparing chat... Infact... i think this is faster still... If Not StrComp(strTest1$, strTest2$, vbTextCompare) Then kinda like !strcmp(*, *) in C++ - MR [View Quote] andrasFeb 15, 2004, 2:51pm
[View Quote]
> Yes I found that quite a while ago, it got an award on Planet Source Code as
> well if I remember correctly. > > Its a very good article, with bots and such I think the main one for people > to pick up will be strings, for comparing chat... > > Infact... i think this is faster still... > If Not StrComp(strTest1$, strTest2$, vbTextCompare) Then > > kinda like !strcmp(*, *) in C++ > > The following assembly codes are 3-6 times faster than the system calls (if you do only ASCII string comparison. It doesn't work for the special locale values): unsigned char LowerCaseTable[256]={ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff }; // those functions are 3-6 times faster in assembly. // strcmp is an inline function, so I can't compete with it :( int strnicmpmine(char *a,char *b,int n) { asm { mov esi,[a] mov edi,[b] mov ecx,[n] xor eax,eax xor ebx,ebx _strloop1:; dec ecx js goodend1 mov al,[esi] inc esi mov al,[eax+LowerCaseTable] mov bl,[edi] inc edi mov bl,[ebx+LowerCaseTable] cmp al,bl jnz badend1 test al,al jnz _strloop1 goodend1:; xor eax,eax jmp _strexit1 badend1: sbb eax,eax or eax,1 _strexit1: } }; int stricmpmine(char *a,char *b) { asm { mov esi,[a] mov edi,[b] xor eax,eax xor ebx,ebx _strloop2:; mov al,[esi] inc esi mov al,[eax+LowerCaseTable] mov bl,[edi] inc edi mov bl,[ebx+LowerCaseTable] cmp al,bl jnz badend2 test al,al jnz _strloop2 xor eax,eax jmp _strexit2 badend2: sbb eax,eax or eax,1 _strexit2: } }; -- Andras "It's MY computer" (tm Steve Gibson) |