DaVinci Resolve 16.1.2 is here yet HEVC Main10 encodes still see an exponential slow down ever since the format was introduced as an output option in Resolve some versions back.
Test setup:
MacBook Pro 16-inch 2019
2.4GHz 8‑core 9th‑generation Intel Core i9 processor, Turbo Boost up to 5.0GHz
64GB 2.6GHz DDR4
AMD Radeon Pro 5500M 8GB GDDR6 1.2 GHz (Navi 14 - RDNA 1.0)
4.5 TFLOPS Single Precision FP32, 192GB/s bandwidth
8TB SSD