Yes, but garbage-collected languages with embedded markers (which Ruby used for a long time) are not at all COW-friendly (because GC runs touch the pages). Onl

Yes, but garbage-collected languages with embedded markers (which Ruby used for a long time) are not at all COW-friendly (because GC runs touch the pages). Only in recent Ruby versions is that not a problem (and was changed for exactly that reason). But yes, your memory report might be read wrong.