Is there a reason Unity doesn't use the Roslyn compiler by default on non-supported distros?

Referring to unity_csc.sh in the Tools/RoslynScripts/ folder.
I saw a massive speedup by manually enabling it for my distro, reducing compile times by 70-80%.

Is there any downside to this or a reason why it's disabled by default?

 

Can you share what enabling it means (how to do it)?
I'd be interested in this speedup as i found compiling noticeably slower than on my windows machine.
(And from what i gather (only?) .net core is required additionally?)

 

Edit the unity_csc.sh script in the Unity/xxx/Editor/Data/Tools/RoslynScripts/
Where "xxx" is whatever version you're using(e.g., mine is 2019.2.6f1)
sed command to change it to always use roslyn:

sed -i 's/USE_NETCORE=0/USE_NETCORE=1/g' unity_csc.sh

 

Thanks, looking through that script it seems many 'common' distros do use roslyn already. Since i had to switch back to ubuntu i guess i won't actually need to modify it anymore then.

 

Anyone tried this on Arch or Manjaro?

 

Yes, I use Arch.