I have been using LibreOffice for years, but recently it has become practically unusable. It doesn’t matter if I am using Calc or Writer or Impress, it has become so incredibly slow. For instance, if I open a tab-delimited file in Calc, I might have to wait 30 seconds or more for Libre to become responsive. Then if I click on a cell, there is 10 seconds or so of lag before it is visibly highlighted. Meanwhile it seems to be slowing other things on the computer. I tried searching for “LibreOffice slow ubuntu” in my browser during one of these lag spells and the browser hung and my text got entered all out of order. I need to be able to work on documents and spreadsheets on my Linux systems, but this is ridiculous.
I have found a few posts on the web suggesting to increase available RAM and delete history. None of this works, and none of it should need to be done anyway. I suspect the problem is a graphics rendering issue, especially given that my browser was lagging while LibreOffice was putting the brakes on my system. I have an Apple MacPro (2012) running Ubuntu 14.04 (no mac OS) and an Nvidia Quadro FX 1700 graphics card. I have this problem whether I use proprietary Nvidia drivers or the Nouveau driver.
I really like LibreOffice, but this problem makes it unusable, and no good solution seems to exist. Further, I find posts from people complaining of similar issues going back at least 5 years so it is likely a bug which has been present a long time but only manifests under certain hardware/software configurations.