Charts draw lots of pixel aligned filled rectangles for tick marks, axis lines, grid lines and even/odd row fills. They are implemented as Paths so that we can draw many rects with minimum number of nodes. This causes them to go though the slow path software rasterization and mask upload path. We should ideally detect when a Path node is just a bunch of filled quads and draw them as a simple vertex buffer of quads. If we can not find a cheap detection method then we could add internal api to give hint to prism that charts can call.