I was a bit concerned with Eclipse’s startup performance. It was taking 12 seconds to start up on a machine with dual XEON’s a gig of RAM running Red Hat Enterprise Linux (RHEL). I started digging. I came across a blog which had the following parameters:
-vmargs -Xverify:none -XX:+UseParallelGC -XX:PermSize=20M
-XX:MaxNewSize=32M -XX:NewSize=32M -Xmx160m -Xms160m
Using these parameters my startup went down to 6 seconds!