Sorta want this type of API, but, CanvasFrame would be tied to a single type...

src/vkprocessor.rs

@@ -265,9 +265,9 @@ impl<'a> VkProcessor<'a> {
         drop(g);
 
         {
-            let g = hprof::enter("Canvas creates GPU buffers");
             // take the canvas frame and create the vertex buffers
             // TODO: This performs gpu buffer creation. Shouldn't be in hotpath??
+            let g = hprof::enter("Canvas creates GPU buffers");
             self.canvas_state.draw(canvas_frame);
         }