manage_pasteObjects() *really* slow

Hi,

with a customer I am working on a migration of basically a simple folder 
structure (about 60k folders with up to 200 very simple AT instances inside 
each folder). For the migration we recreate the folder structure with a new
AT folder types and use manage_copy|pasteObjects() to copy over the 
subobjects. However this is horribly slow. The follow profile (for 3 folders
+ 214 subobjects) shows that a lot of time is spend (or should I say wasted)
in Referenceably._getCopy(). In addition we see 2.6 million(!) calls to 
serialize.persisent_id()..that does not make a much sense to me.  Any 
insights?

Andreas
--------------------------------

  List reduced from 859 to 25 due to restriction <25>

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.001    0.001    4.951    4.951 migrate.py:7(write)
       13    0.000    0.000    4.449    0.342 _transaction.py:287(savepoint)
       13    0.000    0.000    4.448    0.342 _transaction.py:663(__init__)
       13    0.000    0.000    4.448    0.342 Connection.py:1005(savepoint)
       13    0.013    0.001    4.448    0.342 Connection.py:486(_commit)
     3533    0.070    0.000    4.413    0.001 
Connection.py:532(_store_objects)
     3580    0.006    0.000    4.248    0.001 serialize.py:381(serialize)
        3    0.001    0.000    4.248    1.416 
CopySupport.py:160(manage_pasteObjects)
     3580    2.967    0.001    4.242    0.001 serialize.py:409(_dump)
        6    0.003    0.000    4.040    0.673 CopySupport.py:559(_getCopy)
        6    0.000    0.000    4.022    0.670 _manager.py:109(savepoint)
        3    0.000    0.000    1.666    0.555 Referenceable.py:320(_getCopy)
  2636095    1.264    0.000    1.265    0.000 
serialize.py:184(persistent_id)
       21    0.001    0.000    0.309    0.015 
CatalogTool.py:389(catalog_object)
       27    0.001    0.000    0.307    0.011 
ZCatalog.py:551(catalog_object)
       27    0.002    0.000    0.306    0.011 Catalog.py:313(catalogObject)
        9    0.000    0.000    0.303    0.034 
CMFCatalogAware.py:193(manage_afterAdd)
        3    0.000    0.000    0.278    0.093 
constraintypes.py:265(invokeFactory)
        3    0.000    0.000    0.277    0.092 
PortalFolder.py:398(invokeFactory)
        3    0.000    0.000    0.277    0.092 
TypesTool.py:909(constructContent)
        3    0.000    0.000    0.277    0.092 
TypesTool.py:326(constructInstance)
        3    0.000    0.000    0.259    0.086 
TypesTool.py:551(_constructInstance)
        3    0.000    0.000    0.259    0.086 <string>:2(addExtraNetFolder)
        6    0.000    0.000    0.247    0.041 
CatalogMultiplex.py:19(indexObject)
       30    0.000    0.000    0.199    0.007 __init__.py:21(notify)

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (Darwin)

iD8DBQFESJB4CJIWIbr9KYwRAo+XAKDY01umXDUrv0ED/Wwt5mMIPftFwACg4ISN
XqpldSwkWykvfyGvfy+zxQ8=
=5faq
-----END PGP SIGNATURE-----