"J. P. Gilliver (John)"
Tue, 29 May 2018 14:05:22 GMT in
alt.windows7.general, wrote:

I'm not _bothered_, nor wanting to get into deep diagnostics;
however, it _did_ (and does) puzzle me that an old DOS utility
will use so much. (It's a .com file, not a .exe, if that makes any
difference.)

It's an old DOS program that isn't aware of, nor has any real way of
sharing resources with other applications that are running. As a
result, it will consume resources (since it expects to be able to
consume all of them and release some as you run apps thru it via a
click or two) even when it's idle, because it's keyboard polling
routines don't understand time slicing or any other way of sharing
resources or giving them up for others to use.

Anyone else use it and noticed this?

It's normal when the OS has to provide an emulated environment for an
older actual DOS based program for the reasons stated above. You could
do a few things when writing DOS apps to be easier on system resources,
but, you couldn't entirely eliminate the resource sharing issue.



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