**Profiling**

Profiling is, in a nutshell, assessing how quickly the various parts of your program run.  Most often, you'll want your program to run fast, and using a profiler to find slow spots can help you decide what needs work.  There is a simple profiler package included in [tcllib]: http://tcllib.sourceforge.net/doc/profiler.html

[Profiling Tcl] has more on the subject.

***Other profiling packages***

[etprof] is a little profiler in [pure-Tcl].

[Mark Smith]'s profiler.tcl, [http://www.7bsoftware.com/software/profiler.tcl], is yet another pure-Tcl variation.

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