--- Begin Message ---
>
> Finally, there seems to be a popular conception that MEDM is
> slower than DM. Informal testing, however, has indicated that their
> runtime performance is very similar. Older versions of MEDM were
> noticeably slower to start up with very large (over 1 MB) ADL files.
> This version has not been tested against DM with those files. Both
> programs will continue to be developed, and an attempt will be made to
> keep their features consistent. It should be noted that the version
> of MEDM released by DESY is not part of this MEDM distribution
In response to Ken's email regarding medm performance, I made some quick
measurements comparing medm and dm. I started both programs, brought up
the same 4 screens in each one, left them alone for about half an hour, then
terminated the programs. We use medm here at Jefferson Lab, so for the test I
used the conversion utilities written by Deb Kerstiens and Dave Wetherholt to
generate the dm ".dl" files from the medm ".adl" files we use in operations.
The quantities measured during the test were the total CPU time that each
program consumed, the total memory usage on the host CPU, and the memory usage
that each one consumed on the xterminal, which runs the X server hosting the
display:
CPU usage memory usage memory usage on xterminal
on host CPU on host CPU (running the X server)
medm 409 sec 674 KB 2200 KB
(version 2.1.2)
dm 330 sec 406 KB 180 KB
(version 2.4)
The screens used in the test consisted only of text update boxes. It would
be interesting to see similar performance measurements generated from more
graphics-intensive screens.
--
Matthew Bickley Email: [email protected]
Computer Scientist Voice mail: 757-269-7347
TJNAF
--- End Message ---
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