I had the same problem, very slow performance. Then as recommended, Disabled Open CL. Then was ok.
Operating System
Windows 10 Home 64-bit
CPU
AMD Ryzen 7 79 °C
Summit Ridge 14nm Technology
RAM
32.0GB Dual-Channel Unknown @ 1499MHz (16-20-20-38)
Motherboard
Gigabyte Technology Co. Ltd. X470 AORUS ULTRA GAMING-CF (AM4) 27 °C
Graphics
BenQ PD3200U (3840x2160@60Hz)
8176MB ATI AMD Radeon RX 5700 XT (Gigabyte)
Storage
931GB Samsung SSD 860 QVO 1TB (SATA (SSD)) 25 °C
3726GB Western Digital WDC WD40EFRX-68N32N0 (SATA ) 24 °C
3726GB Western Digital WDC WD40EFRX-68N32N0 (SATA ) 26 °C
931GB Samsung SSD 970 EVO Plus 1TB (Unknown (SSD))
Optical Drives
HL-DT-ST DVDRAM GH24NS95
Audio
ASUS Xonar Essence STX Audio Device