Tim> One of the big disadvantages of string views is that they need to
Tim> keep the original object around, no matter how big it is. But in
Tim> the case of partition, much of the time the original string
Tim> survives for at least a similar period to the partitions.
Not necessarily. Presumably a string view would reference another string
object's data buffer. A possible optimization would be to convert from a
view to a normal string once the original strings' refcount dropped to one,
particularly if the view's size was substantially smaller than that of the
original string.
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