Slowness/lag with Calc

Calc Version: has SERIOUS lag. I noticed it immediately after installing. I use the latest Windows and have a fast graphics card. When simply scrolling with direction arrows or trying to scroll by sliding the horizontal or vertical direction bars the software almost becomes unusable. Inserting a new column takes forever. This type of problem - slowness in rewriting the screen - has existed in previous versions, notably before when changing fonts.

Something like that: ?

Caused by bugs 108703 and 109174 I guess. This jerky slow scrolling and slow font change problem has existed in previous versions, then got better, then worse again. A reoccurring problem.