Canvas is only marginally slower than the native 2D drawing APIs (it is a thin wrapper for Skia on Android and CoreGraphics on iOS), but it still uses only a si

Canvas is only marginally slower than the native 2D drawing APIs (it is a thin wrapper for Skia on Android and CoreGraphics on iOS), but it still uses only a single CPU thread for drawing on both platforms. To use the GPU, one has to turn to the -webkit-transform CSS property which, under certain circumstances, promotes the element to a GPU buffer. Only once WebGL becomes accessible will the mobile web have a drawing API that is more efficient than the standard windowing APIs.