wanting to try a GUI toolkit: needing some advice on which one to choose

[Ola Fosheim Grøstad]

On Tuesday, 1 June 2021 at 22:52:41 UTC, Adam D. Ruppe wrote:
> On Tuesday, 1 June 2021 at 22:39:08 UTC, Ola Fosheim Grøstad 
> wrote:
>> Yes, it does. You get lots of graphic context switches and 
>> poor render-caching performance.
>
> no not really.
>
> you'd have to be really incompetent to do it this wrong.

If each widget imperatively draws itself you get graphic context 
switches every time you draw a different graphical element type.

If the render engine manages this, you have much more opportunity 
to group similar items. E.g. do all text of one font size in one 
GPU operation.

Then you also have the whole issue of backing store (caching) 
which cannot be done in an optimal fashion if the widget is in 
control.