Re: [Zope-dev] why is this more efficient

On Mon, 23 Apr 2001, Tim McLaughlin wrote:

Found this in the constructor for the File Product and I don't understand why it is more efficient. (I want to subclass a File, so this does have some purpose ;-)) Anybody got any ideas?

# First, we create the file without data: self._setObject(id, File(id,title,'',content_type, precondition))

# Now we "upload" the data. By doing this in two steps, we # can use a database trick to make the upload more efficient. self._getOb(id).manage_upload(file)

It's more efficient because manage_upload commits subtransactions every N bytes and your main process memory doesn't grow to the size of the file. -Michel