Optimize and speed up Netbeans

In /etc/netbeans.conf set netbeans_default_options to
-J-client -J-Xms32m -J-Xmx512m -J-XX:PermSize=32m -J-XX:MaxPermSize=200m -J-Xverify:none -J-XX:CompileThreshold=100 -XX:+CompressedOOPS -XX:+AggressiveOpts -XX:+TieredCompilation -XX:+DoEscapeAnalysis -XX:+UseConcMarkSweepGC -J-XX:+CMSClassUnloadingEnabled -J-XX:+CMSPermGenSweepingEnabled
So, we allow to use up to 512Mb RAM, compile to byte-code and optimize most of functions.