return immutable continuous view to [beg, end] of this nbuff.
Data copy:
We can avoid data copy if [beg, end] lies within single stored immutable chunk. Then we just return ref to this chunk
We can't avoid data copy if [beg, end] span several chunks. Then we have to join them.
return immutable continuous view to [beg, end] of this nbuff. Data copy: We can avoid data copy if [beg, end] lies within single stored immutable chunk. Then we just return ref to this chunk We can't avoid data copy if [beg, end] span several chunks. Then we have to join them.