I have updated to the latest version of the Adrenalin drivers 19.10.2 and the performance is terrible. The accelaration decrease a lot and I find that the previous version was quite faster. I had to come back to the previous version of the driver, using a restoration point in Windows 10 and now yes, with the 19.10.1 the acceleration is quite fast.
My graphic cards is a R9 280 TOXIC.
I don't know if someone is having this issue, but if someone has detected this, please, post here, so AMD can fix the problem in the next version.