Other cells could be optimized in a similar fashion, but they aren't that slow even with the current code.
5710700 Speed up simple fill of formula cells. Vertical direction only.
sc/inc/column.hxx | 5 ++
sc/source/core/data/column4.cxx | 112 +++++++++++++++++++++++++-------------
sc/source/core/data/table4.cxx | 113 +++++++++++++++++++++++++++++++--------
3 files changed, 172 insertions(+), 58 deletions(-)
Upstream: cgit.freedesktop.org