4 ms·

> The windowing system needs to use the same 31MB before you start the browser up, after all. every process needs its own surface for compositing though. If yo

• kragen 5y ago
  That's definitely one way to do it, and now that you mention it I do know that there are definitely things that do it that way, but it might not be a good one. Windows that aren't visible don't need their output surface to be materialized, and introducing a compositing step after your 4k window renders adds an extra 11 gigabytes per second of memory bandwidth at 120fps, and probably a few precious milliseconds of latency. In the limit of inexpensive rendering — which alpha-blending a few thousand rects from a font atlas might approach — it doubles the battery drain needed to redraw the screen.