I've found that setting resource limits via cgroups for the whole session makes the slowdowns much more manageable. It's definitely not ideal, I'd prefer some m

I've found that setting resource limits via cgroups for the whole session makes the slowdowns much more manageable. It's definitely not ideal, I'd prefer some more elaborate system where each launched app was able to use only up to 90% of system resources, with some 5% always reserved for things like Xorg, the WM and such (and that's doable, I just didn't bother), but it does work.