[Tutor] Am I storeing up problems ?

[Dave S]

Alan Gauld wrote:

>>I needed to copy this matrix to 'self.old_data', so I have been
>>    
>>
>using
>  
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>>.deepcopy(), which works OK but is SLOW .... (12+ secs)
>>    
>>
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>Are you sure you need to copy it./ A simple reassignment should work
>and then reconstruct the structure using fresh lists/dictionary etc.
>That should work faster.
>
>Alan G.
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>  
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Yep this is what I ended up doing, 12+ secs becomes 0.5 sec :-)

My query was To speed things up I changed my code to

# This is the speeded up deepcopy()
self.old_data = self.data
self.data = []
for i in range(110):
   self.data.append({})

Query: Is all this OK, it works and quick as well, but I am concerned I 
may be leaving garbage in the Python PVM since I am shrugging off old 
'self.old_data's which may be mounting up ?

But apparently this is ok (as he cancelles order gor 1GB RAM ;-) )

Dave