[G4] Sluggish Leopard Performance

[Bill Scott]

I am experiencing sluggish performance from my 933 mhz G4 since I  
upgraded.  Has anyone found a solution to this problem?  Leopard has  
finished indexing my hard drive, but still I am using all of my CPU  
is being used by User, instead of 3-10%, as with 10.4  (By sluggish I  
mean the mouse movement is not smooth and folders take longer to open  
than they used to.  Start-up takes more than a minute.)

Any suggestions? Would additonal memory make a difference?  Or do I  
have to upgrade the CPU too?

Bill