alt Hacker NewsIts similar to C++ compilers, there is no one reason. It is a language that tries to optimize a lot, its a big language, it does safety checks, it uses llvm which is a bit slow, its a language that makes use of generics which generate extra code etc etc.
C++ compilers have it better, despite the fame, because on the C++ world, people like their binary libraries (not compiling the world from scratch on each git clone), there better support for incremental compilation, and incremental linking, there are interpreters and hot code reload tooling available.