Playback of an animated mesh with shape or bones is very slow with the subdivision modifier (2.8, 2.81, 2.82.7, 2.83) It is a very serious problem for characters and creatures animation, open subdivisions should use the GPU.
I attach 3 videos.
The problem had been resolved in older versions of Blender (2.7) as you can see in this video where Sharybin shows a dragon flapping its wings (2014):
Test: 200 x 200 sphere (shape animation):
Blender 2.82.7
Subdivision level 1
Frame rate: 3 fps
Blender 2.79b
Subdivision level 2
Frame rate: 59 fps
Maya 2018
Subdivision level 2
Frame rate: 160 fps