Animation Playback Greatly Slowed After 4.0 Update

Hello!
hope you all are having a great time.
I’ve come across a problem where after the recent 4.0 update my animation playback speed has been reduced from 15-20 fps to 8 - 10 fps while using tank models. I don’t know why it has become so slow to run, and it is extremely difficult to animate when it runs as slow as it does.

Hello.
Check out the release notes
Its a major version change so you can expect some things to be drastically different and that there may be some “polyfills” applied that will slow things down in your specific case…
Chances are that you have something like a modifier applied as a stop-gap on some models and once you apply those that the animation speed will become acceptable again.

Good luck.