Variable table information contained in classfiles are usefull for debugging but
not needed for shipped product. That's why we build all netbeans modules in
standard distro with 

build.compiler.debuglevel=source,lines

This reduces size of module JARs (by 10-15%) and decreases slightly memory
usages mostly as it gives us smaller permgen. Our buildmasters should be able to
confugire this easily in their build environment.