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No Fragments Archive 10: Diskmags
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nf_archive_10.iso
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IINFO51.MSA
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TEXT_NEODESK.TXT
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1991-03-14
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A COMPARISON OF NEODESK AND ATARI'S DESKTOP
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
an interesting study conducted by the folks a Gribnif...
We were sitting around the other day and decided that we had never
really done a direct comparison of the speed increase of NeoDesk over
the built-in desktop.
For these tests we used a Mega ST4 with the Blitter turned on. The
machine was equipped with the newer TOS 1.4 and was running on a SM124
monochrome monitor. We also repeated the tests on a Moniterm Viking 2
monitor. Apart from the NeoDesk Control Panel, no other software was
running (when the Moniterm was used the Moniterm driver software was
also running). A plain out-of-the-box copy of NeoDesk 2.05 was used.
The newer TOS 1.4 was used since it is supposed to have the latest (and
fastest) version of the built-in desktop.
Since a manual stopwatch was used, there is probably error margin
of about .3 second. All tests were done three times, best time of the
three was used.
We created a folder with 800 files within it. This directory was
then scrolled from top to bottom with a series of different options.
This was done by holding the mouse over the scroll arrow and holding it
down until all the files had been scrolled. When NeoDesk was used to
display text all the file size, date, and time displays were left on (to
be identical to the built-in desktop as possible).
On the SM124 monochrome monitor:
Type of Test NeoDesk 2.05 Built-in Desktop
------------------------------------------------------------------
min:secs min:secs
With a window that was the full
width of the screen and 2 icons
high (show as icons)............ 0:07.4 0:57.1
With a window that was the full
width of the screen and 5 lines
high of text (show as text)..... 0:48.5 5:30.2
With a window the full size of
the screen (show as icons)...... 0:08.7 1:24.5
With a window the full size of
the screen (show as text)....... 0:58.6 6:23.8
On the Moniterm Viking 2 monitor:
Type of Test NeoDesk 2.05 Built-in Desktop
-------------------------------------------------------------------
min:secs min:secs
With a window that was the full
width of the screen and 2 icons
high (show as icons)............ 0:05.7 0:37.7
With a window that was the full
width of the screen and 5 lines
high of text (show as text)..... 0:30.7 2:17.2
With a window the full size of
the screen (show as icons)...... 0:06.4 (see below)
With a window the full size of
the screen (show as text)....... 0:48.31 6:07.3
It seems that the built-in desktop is has problems displaying a
window the size of the Moniterm screen if it is full of icons. The
built-in desktop can only display up to 249 icons in a window at the
same time. If you attempt to display over 249 icons in the same window
it will start behaving in some rather peculiar ways. It will refuse to
scroll and when it does scroll it will do so incorrectly. Seems that no
one ever bothered to see if the built-in desktop could handle a screen
of the size of the Moniterm. Because of this we were unable to test its
scrolling speed on a full size window on the Moniterm.
More interesting information discovered while doing these tests:
Maximum number of files viewable in a full screen window:
Type of display NeoDesk 2.05 Built-in Desktop
-------------------------------------------------------------------
# of files # of files
SM124 Monochrome, Icons.......... 64 49
SM124 Monochrome, Text........... 18 18
SM124, with no text, size, or
date display (only NeoDesk can
do this)....................... 72 n/a
SM124, with no options, in small
text size (again, only NeoDesk
can do this)................... 128 n/a
Moniterm, Icons.................. 368 249*
Moniterm, Text................... 147** 147**
Moniterm, no text options (only
NeoDesk can do this)........... 441 n/a
Moniterm, no text options in
small text size (again, only
NeoDesk can do this)........... 880 n/a
* Due to a bug in the built-in desktop, it will only display the first
249 icons that can fit in a window. In theory it could display a
total of 300 icons.
** With all file size, date, and time information displayed both the
built-in desktop and NeoDesk display the information in 3 columns
wide. Unlike the built-in desktop, you can turn off the multiple
column display with NeoDesk.
Most of the speed increase in NeoDesk derives from one simple thing.
We do not use the VDI (Virtual Device Interface) part of the Atari
operating system. This is the part that handles all screen drawing,
blitting, and text drawing. The built-in desktop (and just about every
other program available for the ST) depend heavily on the VDI. By
writing our own drawing, blitting, and text drawing routines in our own
high-speed code which uses the LINEA we are able to create a MUCH faster
environment. Sure this requires much more work, but we think the above
numbers speak for themselves.
For more information contact your dealer or:
GRIBNIF SOFTWARE
PO Box 350
Hadley, MA. 01035
1-413-584-7887
---===< * >===---