Copying TransformationMatrix consumed a lot of cpu time while scroll with cursor over content
Created attachment 46750 [details]
Comment on attachment 46750 [details]
Ok, if the assumption this gives more benefit than hurts in memory cost holds true, and it does according to Oliver, it's fine with me, it looks a bit awkward on first sight, but if it helps to improve performance a lot, let's go for it, r=me.
Committed r53365: <http://trac.webkit.org/changeset/53365>