One more issue is created https://issues.jboss.org/browse/JBIDE-13844 "JarAccess should ignore .class entries in jar files". All tools get info about classes from JDT, we scan jars for .xml, .properties, .xhtml, etc. but not for .class entries. They can be just ignored by JarAccess. After that its memory load will drop from 68Mb to 10Mb or less.