Operating system: MacOS 10.14.6
Graphics card: Radeon Pro Vega 48 8GB
Broken: 2.82 alpha 2019-12-16
I imported a largish SVG (300 KB). I joined the curves into one object and then placed a keyframe in the texture space. Blender will then slow down to unworkable. It depends on the size of the curve object, larger means slower.
I can't animate textures that way. So now I am using another object for texture coordinates which works and doesn't slow down at all but I would rather use the texture space.
Developer note: see thread for profiling info and bottleneck