It runs the expression you write in the repl, it's as big as you make it. It'll also be sandboxed against thrashing. It's also asynchronous, showing results it

It runs the expression you write in the repl, it's as big as you make it. It'll also be sandboxed against thrashing. It's also asynchronous, showing results it computed so far. If example is too big you just get feedback that it's still computing.