Rhino 8 - Delay after Isolate, Delay after Create/ Delete layer

Hi everyone,

I switched to Rhino 8 recently and discovered that some commands that ran perfectly on 7 are now delayed in 8.

For example, Isolate. In 7, it ran instantaneously, in 8, it generally takes half a second.

The other exmple is creating a new layer/ sublayer, deleting a layer. It was a snap in 7, now in 8 it’s some quarter of a second delay.

It’s the commands I use many times in every Rhino session.
Is there something I can do abouit it?

Thanks!
H.