If you want a long running calculation to not block the REPL you'd need to use a future, or some other method to get it off the REPL thread. I don't remember w

If you want a long running calculation to not block the REPL you'd need to use a future, or some other method to get it off the REPL thread. I don't remember what your describing being a feature of SLIME, but it's been 10+ years so I may just not remember.