Chris -
Was Eclipse running on the same machine you were executing the ANT script?

From: Chris Stoughton []
Sent: Wednesday, March 25, 2009 11:09 AM
Subject: [Junit-devel] eclipse vs. ant

Tests run 10x slower in ant than in eclipse.  Following the advice in these posts:
I have set fork="false" and maxmemory="1000m" in build.xml.

Would there be another explanation for the slowness in ant builds?