Preliminary benchmarks proved that the Kirin 990 is almost on par with all other major brands, but Huawei is clearly not content with parity. The Chinese company is already planning to release a 5 nm successor allegedly known as Kirin 1000, which will use ARM's Cortex-A77 cores plus a faster NPU, and it should be launched with the Mate 40 in Q3 2020.
https://www.notebookcheck.net/Huawei-s-Kirin-1000-SoC-expected-to-make-the-jump-to-5-nm-with-next-year-s-Mate-40.436345.0.html