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
In addition to creating smaller Projects for the folders you really work on and then a Project Group to group them (Mateng), you can try excluding folders that you will never work on such as images folders and so on. To ignore those folders, go to:
File > Project Properties > Ignored Folders > Add Folder...
From NetBeans Help:
The Ignored Files property is the opposite of the Include Path. These are files inside the PHP project that you want the IDE to ignore for FTP upload, scanning, etc.