2.10 open as layers is so slow

[Zorba]

I also had issues with 2.10 and animations (not just loading them, but the speed in general), even a smallish animation with about 80 layers caused everything to slow to a crawl. I now have a portable install of 2.8 I use for animations and everything runs really smoothly on that. So I'd also be interested in hearing if there's anything we can do to improve performance on 2.10, or if we just have to wait for 2.10 to be optimised in time.