Improve setup and verify code

Now that the refactor is done, we can work on optimizations.

Let's run cprofile and pyinstrument to get some initial profiling stats.

Then let's do a few things:

• child processes run independently from their parent process so perhaps we can take better advantage of this.

• similarity, we could run many child processes in parallel.

• I think the majority of our challenges are setup individually however is there is somewhere that it would benefit to use I/O pipes, let's do so. Perhaps we need to rearchitect, as long as the challenge still teaches the same command/concept, that's fine by me.