Incremental compilation exploration

[asterite]

@FredrikHolmqvist

The (official?) position of the core team is “don’t use Crystal for big projects”(?)

Note that I haven’t been doing any Crystal-related work for a long time. So considering me a core team member isn’t fully correct at this point. And it’s only my opinion, not the entire core team opinion. I’m sure everyone will have a different opinion. I’m only saying what I’m saying based on what I heard from others using Crystal in big projects. But, like all things, everything is a trade-off. If it’s okay for you to wait a bit more for compilation but you really enjoy Crystal and the benefits it gives you, you can try it with bigger projects.