A good start is to look at what version of Tcl you've got:
 info patchlevel
Then look at the contents of the tcl_platform global array:
 parray tcl_platform

See [tcl_platform] for a list of the output of this command on various systems.

Now, if you are running Unix, you can obtain even more configuration information:
 exec uname -a
And for Solaris users, you can find out your processor speed using the following ''magic incantation'':
 exec psrinfo -v
(the executable is located in ''/usr/sbin'' on this machine at least... :^)

On Linux, you can work out your basic memory usage profile using:
 exec free

Unix systems with the luxury of a SYSV ps (like both IRIX and Solaris) can use it to discover useful info about the Tcl process itself:
 exec /bin/ps -p [pid] -o {pid sz rss util pcpu time etime comm}
And there is also ''sysconf'' which is exposed on IRIX systems but not Solaris AFAICT...
 exec sysconf
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Actually, solaris has sysinfo, but it's not all that useful ;^)

I am rather partial to:

   set name xterm
   exec /bin/ps -Ao fname,pid,pcpu,pmem,vsz,rss,etime | grep $name
'''-PSE'''
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See [Measuring your Application's CPU Utilization] for a related discussion.
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Please extend this page with goodies and snippets from other OSes that I know less well!  '''DKF'''

For all versions of Windows, download applications from:
[http://hp.vector.co.jp/authors/VA002374/src/download.html]







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[CL] maintains an exhausting, if not exhaustive, list of ways to calculate
memory characteristics under various Unix flavors at
[http://starbase.neosoft.com/~claird/comp.unix.admin/admin.html#memory].
Several of these commands give configuration information beyond memory.

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[Category Porting]