I don\'t have much memory on my PC and a pretty weak processor. Although netbeans is by far my favorite IDE it is almost unbearable to use on my present computer because of
I've stumbled upon this problem aswell.
The most simple thing is to edit the netbeans config so it doesn't load all your projects. you can always reopen the other projects from the menu. once all the projects you arent using are closed they wont be scanned each time you start netbeans
Solution: Just change the following line in netbeans.conf found under etc folder
# ${HOME} will be replaced by JVM user.home system property netbeans_default_userdir="${HOME}/.netbeans/changeme"