[Patch] FIrst experimental profiler

[Daniel Kraft]

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Hi Jordi and all,

luckily, my holidays are drawing nearer -- and finally I have some more
time as before already.  Attached is my current working code for the
first experimental profiler.  It has still some serious deficiencies (no
really useful interface, probably the documentation of the defined
built-in functions is much, much too brief, no tests and also the
line/column numbering on anonymous functions does not work -- I have no
idea why, but put this aside for the moment).  But it also produces
already at least some results.  For instance, you can:

...start up octave...
profiler_enable (true);
...do some stuff...
profiler_enable (false);
data = profiler_data ();

to get a flat profile in as data-structure in data.  The idea is that
profiler_enable / profiler_data will be called from .m files which
provide the real, user-friendly interface to profiling later; but at the
moment those do not yet exist.  Also currently nothing more than a flat
profile is produced, which gives total "self" execution times of all
functions that were called.

Comments are very welcome -- especially as this is my first attempt at
actually writing some non-trivial code for GNU Octave.  Also, if anyone
has an idea what's going wrong with the line/column numbers, please let
me know!

Apart from that, my next plan as to look at how the "profile" function
of Matlab works and implement a similar interface based on the built-ins
already in my patch (and modify them if necessary, of course).

Yours,
Daniel

- -- 
http://www.pro-vegan.info/
- --
Done:  Arc-Bar-Cav-Kni-Ran-Rog-Sam-Tou-Val-Wiz
To go: Hea-Mon-Pri
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