I would say if you focus every waking hour then you could maybe get 1 year of knowledge crammed into 4 months, because of the compounding effects, even though t

I would say if you focus every waking hour then you could maybe get 1 year of knowledge crammed into 4 months, because of the compounding effects, even though the actual time spent would only be about 8 months (16 hour days vs 8 hour days). Programming comes down to a ton of practice, which turns knowledge (books, videos) into a skill.