Recently, I've been having problems with scrubbing and playback in CS5. It's slower than usual; it takes a while for the playback to "catch up" with the scrubber. I'm on a MacBook Pro, 4GB RAM and 500GB hard drive (~380GB free). I'm not too certain about the specs beyond that, as I got it back in '09, but I've only been having the problem recently. I tried cleaning out some of my old, unused files, but that didn't seem to help much. Any suggestions?
What kind of footage? What are your sequence settings? If you're trying to edit demanding footage and/or work with a sequence with a large frame size on a laptop with not very much memory, performance may not be great.
Also, have you installed the Premiere Pro CS5 (5.0.3) update? The recent updates have made many performance improvements.
Well... think about trying to use only ONE Hard Drive for Video Editing
You are a music conductor, with a baton that you use to point to various parts of the orchestra... this is like the OS pointing to various parts of the hard drive to do housekeeping or to load program segments for various functions
Now, at the same time and with the same hand... while still using the baton to conduct the orchestra... pick up a bow and play a fiddle... this would be doing something with your video file at the same time as all the other work
You as a person cannot do both at the same time with the same hand
A computer is a LITTLE better, in that it can switch from one kind of task to another very quickly... but not quickly enough for easy video editing
One hard drive is not as good as two which is not as good as three