Win 10
GTX 1070 - Studio Driver 462.59
Blender 2.92 - Hash 02948a2cab44 - 2021-02-24
Blender 3.0 - Hash f694321db073 - 2021-05-09
Cycles-X - Hash eae783e3ce36 - 2021-05-11
Apparently caused by {rB267a9e14f5a7} (at least for Material and Rendered viewport shading - cannot speak for Solid)
**Short description of error**
Massive drops in Animation playback
**Exact steps for others to reproduce the error**
I have this test scene here from the forum (unfortunately I forgot the direct link).
{F10087476}
2.92
Solid - 223 fps
Material - 143 fps
Rendered - 85 fps
3.0 and Cycles-X
Solid - 79 fps
Material - 66 fps
Rendered - 50 fps