Ruby has been around since 1995. That's over 15 years.
Implementing bitmaps for mark-and-sweep a project well within the skills of a final year undergrad, or first year graduate student of CS.
You can say many things, but I doubt they didn't implement this because they didn't have time, or didn't have the skills to do so. They merely prioritized against it from day-one.
Implementing bitmaps for mark-and-sweep a project well within the skills of a final year undergrad, or first year graduate student of CS.
You can say many things, but I doubt they didn't implement this because they didn't have time, or didn't have the skills to do so. They merely prioritized against it from day-one.