Slow search performance using Wildfire (w/LDAP) and Spark

Using Wildfire v2.2.4 with LDAP Authentication (not using shared groups) and I’'ve got the search plugin v1.1.5 installed. It seems to be taking an unreasonable amount of time 15-20 seconds when performing searches using Spark 1.0.4 … even when there are no matches.

There are only 64 users defined. Has anyone else seen this problem?