The compile time latency is really bad for some libraries. I was recently testing out computing class groups using https://github.com/oscar-system/Oscar.jl htt

The compile time latency is really bad for some libraries. I was recently testing out computing class groups using https://github.com/oscar-system/Oscar.jl https://github.com/oscar-system/Oscar.jl and was surprised to hit *several minute* latency due to LLVM compilation. For me, the most striking things are that (1) there is no indication in the REPL that calling a function is slow due to LLVM compilation, rather than the function actually running, and (2) it is difficult to avoid paying the compilation penalty every single time you restart Julia, since caching the JIT in general is a technically very, very difficult problem. I wonder if there is an easy fix for (1) that I don't know about: some way of showing a spinner or something saying "I'm compiling code right now".