checkerboardOffscreenLayers property

Whether the compositor should checkerboard layers that are rendered to offscreen bitmaps. This can be useful for debugging rendering performance.

Render target switches are caused by using opacity layers (via a FadeTransition or Opacity widget), clips, shader mask layers, etc. Selecting a new render target and merging it with the rest of the scene has a performance cost. This can sometimes be avoided by using equivalent widgets that do not require these layers (for example, replacing an Opacity widget with an widgets.Image using a BlendMode).