WPF high-performance drawing - should I group by brush color?

Question

In Direct2D, they recommend drawing similar things together to avoid unnecessary GPU state changes. They also perform some backstage drawing operations just for that.

I need to draw a lot of rectangles that can have one of two colors. I am going to make a drawing in two passes, one for rectangles with the first color, and the other for those with a different color.

Do you have any idea if the rendering speed will improve? The speed that I have now is not so great. I am drawing a DrawingContext derived from DrawingVisual.

Answer 1

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: http://msdn.microsoft.com/en-us/magazine/dd483292.aspx