If you’re using Ubuntu on an older computer, you might find that performance is not what you’d like. The best solution is always to expand the system if possible, and more memory will make the biggest difference. However, if that’s not possible then you might want to try relinking. This makes for faster program start times by linking library files and executable for better memory usage. However, it doesn’t work with all programs and larger programs in particular seem to benefit most. In fact, you may not see much improvement and a handful of users have even reported that some applications won’t start after prelinking. However, it’s trivial to remove prelinking, so you might as well give it a try.
$ gksu gedit /etc/default/prelink
Look for the line that reads PRELINKING=unknown and change it to read
PRELINKING=yes. Then save the file and close Gedit.