I am using Ubuntu 14.04LTS and I haven't really had much luck using LibreOffice. I am currently using LibreOffice v22.214.171.124 build ID: 420m0(build:2). I attempted to switch to Open Office and this hasn't fixed the problem either. I posted a video to youtube showing how slow LibreOffice is on a typical refresh:
I am running an Intel Q6600 with 8GB of ram, with an ATi R7 260x video card. I also have 3 monitors attached to this card. I am using the Catalyst driver instead of the Radeon driver. I've tried disabling "Use hardware acceleration" to see if that might help, though to no avail.
I've stopped almost all user processes and this doesn't seem to help. Top indicates a load average of 0.26, 0.50, 0.69. When I minimize the window and restore it, I temporarily see the xfdesktop process jump to ~25% but drops quickly, however, kworker and migration processes goes to ~30% during the entire time that it takes to refresh the UI, and on completion go down to nothing.