Phoronix: New XWayland API Proposed For Better Performance

A new XWayland API has been proposed for helping the X.Org drivers implement the ScheduleSwap event and for providing an efficient implementation of async swaps. The new interfaces for XWayland can avoid copies and thus provide real-world performance improvements...

http://www.phoronix.com/vr.php?view=MTQ4ODA