I don't think you can. I also don't know why people care so much about it - I work full time with ruby and compiling a new version, which maybe takes 10 minutes, a couple times a year is no big deal.

I think it comes mostly from CI environments that start entirely clean before every run. 10 minutes every time a commit is pushed is not pleasant. That's not how I'd like CI to work, but sadly it seems to be the current state of things.