Subj : Re: scrolling slower in 32 bits mode than in 16.
To   : borland.public.cpp.borlandcpp
From : Bob Gonder
Date : Thu Mar 10 2005 01:09 pm

Morosh wrote:

>I wrote a program and I was compiling it in 16 bits mode using bcc (borland
>v5.02)
>I tried  to compile with bcc32 (as there is less problem for data space)
>It worked but the scrolling was very much slower than with bcc.
>
>To isolate the problem, I wrote a very simple program to test the scrolling:
>
>#include "stdio.h"
>void main()
>{
>int i;
>for(i=32;i<1024;i++) printf("%i ",i);
>}

>My question is: is there a way to have scrolling under 32bits as fast as
>under 16 bits

See if this is any faster (not tested)?

#include	<windows.h>

int main()
{
	int	i;
	DWORD	byteswritten;
	char	msg[64];
	HANDLE	 stdout = GetStdHandle(STD_OUTPUT_HANDLE);

SetConsoleMode(stdout,ENABLE_PROCESSED_OUTPUT|ENABLE_WRAP_AT_EOL_OUTPUT);

	for(i=32;i<1024;++i)
	{	wsprintf( msg, "%i", i );
		WriteFile(stdout,msg,lstrlen(msg),&byteswritten,NULL);
	};
	return 0;
}
In my own app, I completely control the screen, never scroll, and turn
off WRAP_AT_EOL. I also don't use any C/C++ console functions, using
pure Win32 API. (My clear screen is about 10 times faster than the CRL
version).

>I compiled it with bcc: bcc -4 -ff -N -ml test.cpp
>and with bcc32: bcc32 -6 -fp -N -d test.cpp

-ff and -fp are floating point, and have no affect on this program.
I can't find a -N switch for bcc32
You should also specify the target:  -WC
And, when you get into bigger programs, look to add  -O2 -Oi -OS -Ov

.