PDQ: Pretty Damn Quick [http://www.perfdynamics.com/Tools/PDQ.html] is a tool for analyzing computer systems performance. It has been the basis for a couple of books by Neil Gunther, the latest of which is "Analyzing Computer Systems Performance with Perl::PDQ"[http://www.perfdynamics.com/iBook/ppa_new.html].

As the name suggests, the book uses Perl. But since all the author did was use SWIG to wrap his PDQ C library, you can pretty easily substitute Tcl for Perl (which is what I am in the process of doing -- [Todd Coram]).

Interestingly, Tcl with PDQ runs a tad bit faster than Perl::PDQ (probably due to a faster Tcl startup).
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Not to be confused with PDQ [Ledger] 1.6: A Finance Application[http://pdqi.com/ledger.html],
which is written in Tcl/Tk.
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[Category Application]
[Category Performance]