Re: manage_pasteObjects() *really* slow

Andreas Jung wrote at 2006-4-21 09:57 +0200:
> ...
>The follow profile (for 3 folders
>+ 214 subobjects) shows that a lot of time is spend (or should I say wasted)
>in Referenceably._getCopy().

"Referenceable._getCopy" is a tiny wrapper around "CopySupport._getCopy".
Almost all its time is spend in "CopySupport._getCopy".

The only surprising thing is that "CopySupport._getCopy" appears to
be called 6 times while you tell us that 3 folders are copied.
You may use the current "ZopeProfiler" to analyse from where
the other 3 "CopySupport._getCopy" are called.


It is natural that "_getCopy" is expensive as the complete object
is read from the ZODB and thereby copied.

>In addition we see 2.6 million(!) calls to 
>serialize.persisent_id()..that does not make a much sense to me.  Any 
>insights?

"serialize.persistent_id" is used as Python's pickle
"persistent_id" hook. Pickle calls it for any pickled value
to allow the value to be potentially recognized as a persistent object.
Apparently, you copy complex objects with lots of values ;-)


I you really only want to only restructure the site, you can move
rather than copy the objects -- this is *FAR* cheaper.


-- 
Dieter


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