Wait, performance or posts jumping around? 

Performance should be pretty good these days, especially on higher-end devices. What are you seeing?

I am currently fighting the video player cache which hangs for a few milliseconds when opening new videos and is quite annoying. But other than that, Amethyst should run smoothly. 

You can go to the phone Settings/Apps/Amethyst and "Force Close" it to clear the memory cache and see if that was your source of issues.