[Edu-sig] Properties use case

Arthur ajsiegel at optonline.net
Thu Mar 16 19:06:02 CET 2006

Arthur wrote:

> I actually think your way is best to achieve ultimate transparency for 
> pedagogical purposes, even at the sacrifice of performance.  I am more 
> and more thinking that a good deal of Numeric is overkill for my 
> purposes as well - sacrificing transparency for what is probably not 
> tremendous performance benefits when I am dealing only in 2x2, 3x3 and 
> 4x4 arrays.  Since Numeric is designed as a general use library, it 
> needs to spend some time determining what it is looking at when, for 
> example, doing linear algebra - what shape are the arrays it is 
> looking at, what type, etc.  In the controlled environment that I am 
> working in in PyGeo I know what I am sending along, so I think I can 
> gain some of the time back that I would be loosing in going from C to 
> Python simply because I can design things in a way where little is 
> general, everything is specific - we know what we are getting because 
> we are sending it.  Have been experimenting with all this, as it happens.
> Art

Just thought I'd throw out the tool I am using for my "experiments".

Python Performance Validator - an (expensive) commercial product to be 
found at


Working with a free fully functional 30 day trial version, seeing what I 
can learn about my code with it before it expires, and then will 
probably be left to other tools, as I can't justify its cost for my 

But at least I can give them a plug.

I have found profiling, formal debugging, etc. somewhat complicated by 
the fact that I am working with a graphical and dynamic application.  
Not that that's so unusual a situation to face, but some of the issues 
that arise seem to me to come under the category of Profiling 103, and I 
never got through 101. 

This tool has helped me get my bearings.


What it solves for me is the problem of separating performance issues, 
e.g. start-u

>> Kirby

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