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Subject: Single-machine testing with Junior 5 (was: Re: Ok here we go:)

Author: Kai Lübke

Date: 02:15:10 01/21/99

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On January 21, 1999 at 01:41:18, Steven Juchnowski wrote:

>For what ever reason, Junior5 can lose up to 70% of it's speed
>when used against other software on the same hardware.
>
>Most other programs can lose 5-50% under the same conditions.

Since I used to play single-machine games myself in the past, I still test
programs as to how they work under these conditions.
My observations are as follows (all considerations for "permanent brain off", of
course):

DOS programs: don't slow down others noticably, get slowed down to 70%
  (not *by* 70%) by Windows programs such as Chessmaster or Nimzo 98.
Windows programs:
   Chessmaster 5500/6000: slows opponent down to 75-80%
   Nimzo 98: slows opponent down to 45-55%
   Virtual Chess II: slows opponent down to 65-75%
   Fritz 5 (16 bit): slows opponent down to 95-98%
These slowdowns are mutual, i.e. in a Nimzo vs. CM game, CM would play at about
50% and Nimzo at about 75% of its usual speed.

Now for the 32 bit Chessbase programs (Fritz 5.32, Junior 5, very likely also
Nimzo 99), it is a different story.
They don't cause much slowdown themselves, but they are _extremely_ sensitive
towards other programs running.
I have seen Junior 5 slow down to some 3-5 Knps (!!!) when for example
Chessmaster is running at the same time (even if CM just sits there doing
nothing), the same against Nimzo 98 and Genius 5 Windows.

The general rule is: single-machine testing with any 32 bit Chessbase program is
strongly discouraged, at least against other Windows programs (except Fritz 5
and WinBoard which are "friendly").

---
Shep




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