[Zope] object instances as meta_data in ZCatalogs?
Dieter Maurer
dieter@handshake.de
Mon, 3 Sep 2001 00:06:28 +0200 (CEST)
dee900@anusf.anu.edu.au writes:
> ....
> 1) You wake up each object and call
> "distance_to(test_point)"
> for each. Clean but performance hit for waking up.
>
> 2) You add x and y as meta_data, rewrite the method
> distance_to(test_point) as distance_to(x,y). Now
> you no longer have to wake up each point as the x
> and y are quickly available in the pluggable brain.
> It's quicker but less object-oriented. Starts to look
> a little like old C code - distance_to(x1,y1,x2,y2).
> Further, it becomes a real mess when your "distance_to"
> calculation uses many properties in addition to x and y.
Make a little test and compare the two approaches.
I would not expect that the performance penalty of
method 1 is that great when the objects woken up
are relative local.
Dieter