Operating system: Windows 10, Version 1809 (OS Build 17763.615)
Graphics card: GeForce GTX 1050ti
Short description of error
Running a low-poly animation scene, with simple characters. Navigating the scene runs smoothly, but as soon as I try to watch it animated, the FPS drops to less than 10, making animation basically impossible. Same scene worked fine in 2.79.
Exact steps for others to reproduce the error
Run a moderately complex scene, and try playing an animation while in either Cycles or Eevee.