Slow tab switching in Vim with large terminal

My vim is very slow to switch tabs (:tabnext) when i've 开发者_Python百科fullscreened my terminal (1920x1200).

Does anyone have a fix for this? Is it a vim issue, or is it my setup? Redrawing a black terminal (gnome-terminal) with a bit of text shouldn't be that hard.

It is probably the gnome-terminal problem. Vim with my fullscreen (1920x1080) rxvt-unicode (urxvtc) terminals works just fine.