Date: Tue, 26 Jul 1994 08:12:06 +0100 (CET)
From: "Roland Exler" <R DOT Exler AT jk DOT uni-linz DOT ac DOT at>
Sender: k3a0270 AT pop DOT uni-linz DOT ac DOT at
Reply-To: R DOT Exler AT jk DOT uni-linz DOT ac DOT at
To: <djgpp AT sun DOT soe DOT clarkson DOT edu>
Subject: RE: Compilation Speed and Windows Dos Shell

In message Tue, 26 Jul 1994 09:40:03 +1000 (EST),
  Mr WT Wong <wtwong AT fawlty8 DOT eng DOT monash DOT edu DOT au>  writes:

> I noticed a large discrepancy in the compilation times of gcc
> when running under normal dos and under the dos prompt in windows. ...

Hi John,

I don't know about your configuration especially your memory-organisation.
I tried to compile one program first under DOS, then Windows/DOS-Shell and
last with Windows/DOS-Shell set to execute in the background. The
compilation-times have been 12/14/15 seconds (same order), so Windows is
always slower than pure DOS.

Maybe you havn't any disk-cache using dos, so windows does this for you.
I'll send my config.sys, autoexec.bat and the output of MEM with this mail,
so you can compare to yours. My machine is a 486/66, 32MB Ram, 1GB HD
running DOS 6.2.

If you can find out what's the real reason for this speed-difference it
would be fine to find the answer at the list.

Roland
+---------------------------------------+---------------------------+
I Roland Exler                          I EMAIL:                    I
I Universitaet Linz                     I R DOT Exler AT jk DOT uni-linz DOT ac DOT at I
I Institut fuer Elektrische Messtechnik I                           I
I Altenbergerstr. 69                    I Phone:                    I
I A-4040 Linz, AUSTRIA                  I + 43 732 2468 9205        I
+---------------------------------------+---------------------------+
CONFIG.SYS:
------------------------------------------------------------------------
DEVICE=c:\SYPLUS\SYFILES\ASPI4DOS.SYS /D
REM DEVICE=C:\TOOLS\ADAPTEC\ASPI4DOS.SYS /D
DEVICE=C:\DOS\HIMEM.SYS /TESTMEM:OFF
BUFFERS=10,0
FILES=99
DOS=UMB
LASTDRIVE=E
FCBS=4,0
DEVICE=C:\DOS\EMM386.EXE NOEMS RAM
DEVICEHIGH /L:1,12240 =C:\DOS\SETVER.EXE
DOS=HIGH
DEVICEHIGH /L:1,37824 =C:\TOOLS\MAUS\MOUSE.SYS BUS
STACKS=0,0
SHELL=C:\DOS\COMMAND.COM C:\DOS\ /e:600 /p

AUTOEXEC.BAT:
------------------------------------------------------------------------
@ECHO OFF
LH /L:1,17184 C:\DOS\KEYB GR
c:\nupop\exp16.com 0x60 0x360
PATH c:\dos;d:\gnu\bin;
set compiler_path=d:/gnu/bin
set c_include_path=d:/gnu/include
set cplus_include_path=d:/gnu/cplusinc;d:/gnu/include
set objc_include_path=d:/gnu/include
set ocjcplus_include_path=d:/gnu/include
set library_path=d:/gnu/lib
set tmpdir=/temp
set go32tmp=/temp
set go32=driver d:/gnu/drivers/tseng4k.grd gw 1024 gh 768
set bison_simple=d:/gnu/lib/bison.simple
set bison_hary=d:/gnu/lib/bison.hairy
set flex_skeleton=d:/gnu/lib/flex.skeleton
set go32=driver d:/gnu/drivers/tseng4k.grd gw 1024 gh 768
d:
cd gnu
LH /L:1,6512 C:\DOS\doskey /Bufsize=1024 /insert
C:\DOS\doskey /Bufsize=1024 /insert > NUL
C:\DOS\doskey r=cd \
C:\DOS\doskey d=dir $* /p
C:\DOS\doskey dw=dir $* /w
C:\DOS\doskey da=dir a:$* /p
C:\DOS\doskey db=dir b:$* /p
C:\DOS\doskey de=dir $1*.exe /p $2 $3 $4
C:\DOS\doskey dc=dir $1*.com /p $2 $3 $4
C:\DOS\doskey t=type $*
C:\DOS\doskey c=copy $*
C:\DOS\doskey x=xcopy $*
C:\DOS\doskey q=c:\dos\q.exe $*
C:\DOS\doskey b=c:\tools\boxer60a\b.exe $*
C:\DOS\doskey ff=dir $* /b /s /p
C:\DOS\doskey end=smartdrv /s /c
C:\DOS\doskey t5=c:\q\t5\turbo.exe $*
C:\DOS\doskey t7=d:\bp\bin\turbo.exe $*
C:\DOS\doskey hp=c:\emtex\dvihplj @c:\emtex\hdj.cnf $*
C:\DOS\doskey v=c:\emtex\dviscr @c:\emtex\hdviscr.cnf $*
C:\DOS\doskey hpq=c:\emtex\dvihplj @c:\emtex\qdj.cnf $*
C:\DOS\doskey vq=c:\emtex\dviscr @c:\emtex\qdviscr.cnf $*
C:\DOS\doskey dbase=c:\dbase\dbase
PROMPT $P$G
SET TEMP=E:\
SET DIRCMD=/og
LH /L:1,1424 C:\TOOLS\SIGMA\MONITOR.COM
LH /L:0;1,46016 /S C:\DOS\SMARTDRV.EXE 12288 4096

MEMORY-USAGE (MEM):
------------------------------------------------------------------------
Speichertyp               Insgesamt  =   Verwendet  +     Frei
-----------------         ----------     ---------      ---------
Konventioneller                 640K           35K           605K
Hoher                           139K           72K            67K
Reserviert                      384K          384K             0K
Erweiterung (XMS)            31,605K       12,557K        19,048K
-----------------         ----------     ---------      ---------
Insg. Speicher               32,768K       13,048K        19,720K

Insg. unter 1 MB                779K          106K           672K

Maximale Gr|~e f}r ausf}hrbares Programm           605K  (619,728 Byte)
Gr|~ter freier Block im hohen Speicherblock         64K   (65,520 Byte)
MS-DOS ist resident im oberen Speicherbereich (High Memory Area).