Performance: Difference between revisions

|goal=Toolkit has two services that capture thumbnails of pages: a "foreground" service and a new "background" service.  The foreground service draws the content windows of pages that the user has opened to canvases on the main thread.  The background service exposes an API that uses a remote xul:brower to load pages on demand in the hidden window and then in the content process draws the resulting content windows to canvases.  Both services write thumbnails to disk on a background thread from the main process.  The goal here is to minimize the impact in the broadest sense of both services: the user's perception of jank, resource use, time taken to draw to canvas, etc.