Speeding up use of gtk_render_background?

Platform Core
1

Hi

I’m trying to speed up some code using gtk_render_background, see here:
https://cgit.freedesktop.org/libreoffice/core/tree/vcl/unx/gtk3/gtk3salnativewidgets-gtk.cxx#n2655

And I see a lot of time spent in style calculations. Is there some way I can freeze/pre-calculate/etc this part of the drawing process?

Thanks, Noel

Screenshot%20from%202019-11-25%2016-48-36
Screenshot%20from%202019-11-25%2016-48-361602×875 167 KB

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