insert zms objects via external method?

Dear List

I have a python script as external method which parses xml and returns a dictionary with items  (appr. 200-300).
then I create for each item in the dict a spec. object via a dtml-method 
but this causes a rather heavy load on the server...

is there a (more elegant) way to insert spec. objects into zms ... maybe directly from the external method?

regards, Th. Weber