LLVM is very big, takes ages to compile and compiles code relatively slowly. Also because it was designed to compile C there are occasionally C-isms that make i

LLVM is very big, takes ages to compile and compiles code relatively slowly. Also because it was designed to compile C there are occasionally C-isms that make it suboptimal for other languages with different properties. (Although a hobby project is never going to beat its performance even accounting for that.)