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- Newsgroups: comp.os.os2.misc
- Path: sparky!uunet!munnari.oz.au!bruce.cs.monash.edu.au!monu6!yoyo.cc.monash.edu.au!parry
- From: parry@yoyo.cc.monash.edu.au (Tom J Parry)
- Subject: Re: Service Pack Results...
- Message-ID: <1992Nov5.102042.16261@monu6.cc.monash.edu.au>
- Originator: parry@yoyo.cc.monash.edu.au
- Sender: news@monu6.cc.monash.edu.au (Usenet system)
- Organization: Monash University, Melb., Australia.
- References: <1992Nov3.144905.2229@cbnews.cb.att.com>
- Date: Thu, 5 Nov 1992 10:20:42 GMT
- Lines: 32
-
- larry.a.shurr (shurr@cbnews.cb.att.com) wrote:
- >
- > This is my impression, as well. PM Windows appear faster, but windowed
- > VIO & VDM sessions are slower than before. The VIO & VDM windows appeared
- > to be updated in interleaved "zones" -- watch carefully during a full
- > screen paint or a scroll, though maybe it's less visible if you have a
- > faster CPU than my 16MHz 386sz. The interleaved update is an old technique
- > we employed on slow systems to keep screen updates from appearing to "sweep"
- > from top-to-bottom, a behavior which many find unsightly and emphasizes
- > slowness. The interleaved update, on the other hand, seems to give an
- > impression of greater speed.
-
- I have been playing with Linux and X386 on a 486-33 recently and the speed
- of X (running in 4MB with about 2MB free!) is awesome compared to the wps
- especially in xterm windows. One of the reasons for this seems to be the
- way xterm does screen updates. It seems to update the screen to what is
- happening at the time of the update. So a long multi-page directory listing
- may be done in 2 or 3 updates. Compared to OS/2's 50 updates for the same
- action, it makes xterm much faster.
-
- When using full screen OS/2 sessions, I can get 128lines scrolled by in
- 0.78 seconds. I certainly can't see everything that is displayed. If I want
- to I will pipe the output somewhere. In a windowed session, it scrolls each
- line. If it just displayed the whole screen as it should appear at the
- _time_ each update starts then the screen would scroll maybe 25 lines at a
- time and things wouldn't be so slow and we'd be able to see as much as we
- can from a full screen session. It's rediculous to redraw the screen for
- every line of output if it's coming that fast.
-
- --
- Tom J Parry.
- Your reality is a figment of my imagination.
-