gvim and sliding command output animation

Commands such as :reg, :ls and :grep/:cl often produce a long output
which can take all 1080 pixels of my screen (in height).

In terminal vim, the screen is instantly refreshed and the entire output
becomes visible replacing the normal window content.

In gvim, the output is sliding line by line from the status line to the
top window edge which takes maybe a second or two during which I can do
nothing but stare at this useless animation (which is also hard on my eyes).

Is there some preference controlling such behaviour which I can disable
and make the output appear immediately?

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