Phoronix published Linux Still Yields Better Multi-Threaded Performance On AMD Threadripper Against Windows 10 May 2019 Update A quote from the article:

Curious whether the recent Microsoft Windows 10 Version 1903 (May 2019 Update) improved the multi-threaded performance at all for the likes of the AMD Ryzen Threadripper 2990WX, I recently carried out some benchmarks looking at Windows 10 1903 against the former Windows 10 Version 1809 release benchmarked against both Ubuntu 18.04.2 LTS and the latest Ubuntu 19.04.

 Linux Still Yields Better Multi-Threaded Performance On AMD Threadripper Against Windows 10 May 2019 Update