It seems incredible that they can't sacrifice some speed to parse on every read, and yet are also unwilling to sacrifice some disk space to cache several fully

It seems incredible that they can't sacrifice some speed to parse on every read, and yet are also unwilling to sacrifice some disk space to cache several fully parsed versions. Considering how quickly CPU and disk performance change, this type of tightrope-balanced optimization seems crazy. Or maybe they're way smarter than me.