If a RenderReplaced has overflow, it has to do a hash lookup for each call to overflowHeight(), overflowWidth(), overflowLeft(), overflowTop() and overflowRect().
We should use fewer methods that return IntSizes etc. to avoid all these hash lookups.
It looks like the overflow logic has been refactored since this bug was opened and we don't have a hash lookup for any RenderReplaced overflow functions anymore.
Simon, is there something to be saved of it or should we just close it?
Oops, I did not mean to close it. Feel free to reopen if there is something to be saved.