In this thread [https://forum.unity.com/threads/2019-3-slow-build-times.929508/#post-6083562] I'm looking at long script compile times in my project. To summarize, the top libs are: Something like Unity.Mathematics I don't want to recompile every time I make a script change in my project, especially for unrelated code. If I add a line of debug logging, and do a script only compile, I have to wait roughly 7 seconds for Unity.Mathematics to compile despite no changes being made to it. I know caching different combinations of binaries can be complicated, but I was thinking of making my own system if this isn't supported by Unity directly. I rather not waste time if it exists though!