1.15.1 poor performance and strange scaling.

Framerate Issues

After the 1.15 update, performance became very poor. My framerate halved, and I had to go down from 32 chunks to 20 for it to remain in the 50s.

The world I had been playing in did have a significant number of entities, but opening a new world in 1.15.1 showed continued performance problems.

I tried switching the amount of allocated RAM from 12GB to 6 but saw no improvement or change in the framerate.

I've messed with framerate settings, and that hasn't affected performance.

My system:
Alienware Aurora R7
Intel Core i7 8700
32GB DDR4 2666MHz RAM
GTX 1080 8GB

Incorrect Scaling

If I allow the game to detect the resolution in the launcher, scaling goes up by ~200%, and GUI scale is also double its proper size. The splash text is pixellated while this happens. If I switch back to the desktop, I can see that it's impacting Windows 10 as well. My desktop will have huge icons for a couple of seconds until Windows changes the scaling back to normal.

There is a fix for this. If I set the resolution in the launcher to my monitor's resolution, the game will properly scale to my monitor's resolution.

1440p@60Hz