Converting DBLP_Publication objects to Publication takes a long time. What is the cause?

To reproduce go to the alias page of a DBLP author for which not all publications have been converted yet, e.g.

http://webdsl-test.ewi.tudelft.nl/researchr/alias/shriram-krishnamurthi?logsql

Submitted by Eelco Visser on 4 October 2013 at 11:44