Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!apple.com!gandalf
From: gandalf@apple.com (Martin Gannholm)
Newsgroups: comp.sys.mac.hypercard
Subject: Re: Slow Lock Screen and Unlock Screen
Message-ID: <11521@goofy.Apple.COM>
Date: 14 Dec 90 02:08:33 GMT
References: <1990Dec12.225940.6563@dhw68k.cts.com>
Sender: usenet@Apple.COM
Organization: Apple Computer, Inc.
Lines: 33

In article <1990Dec12.225940.6563@dhw68k.cts.com> mrx@dhw68k.cts.com (Mark 
Murphy) writes:
>    I have noticed something very wrong with Lock Screen and Unlock 
Screen.
> It seems to me that they have gotten slower!  I have the following 
script:
> ...>>>script deleted<<<...
> Now... it takes this script about 78 ticks to execute on a MacIIcx with 
256
> colors.  In other words, to update three fields on the screen, it takes a
> little over a second.  If I remove the lock and unlock screen commands, 
the
> script only takes 18 ticks.  Wow!  What a difference!  Looks like 30 
ticks
> for each lock and unlock.

The lock doesn't take any time; it's the unlock. Since we don't know what 
things you've changed since you locked the screen (indeed, we don't even 
know if you're on the same card!), we force a redraw of the whole card. 
When the screen isn't locked, we just redraw the area affected by the 
change.

I guess we could consider trying to remember which parts of the card (or 
bkgnd) you changed and, if you're on the same card, only redraw stuff in 
that area. There is certainly room for optimizations in several parts of 
HC...we just didn't have time to do them.

Martin Gannholm
HyperCard 2.0 Engineer
Apple Computer

Exclaimer!!!   I typed this myself = I speak for myself...
..or..I never said it...Nobody heard me say it...You can't prove anything!