Xcode 11.3 create huge amount of swift processes

Hi all,


I have a problem with Xcode 11.3 compile performance, for some reason very often it creates huge amount of swift processes (around 100!!!), my macbook pro (15-inch, 2019, Core i9 2.3, Catalina 10.15.2) almost not usable at this time and compiling takes forever in such case, is that some known issue, can I limit somehow amount of parallel swift processes?