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Changes between Initial Version and Version 1 of Ticket #1424, comment 1

initial	v1
1	1	* r15183 merges the zero copy code (and removes some unused variables, more removed in r15185)
2	2	* r15184: don't queue draws, r15187: lower timer delay
	3
	4	We could also modify {{{process_receive_queue}}} to only parse the "packet size", "packet flags" and "padding" when we get the full 8-byte header - small saving which would make the code harder to read. meh.
3	5
4	6	With these changes, testing with glxspheres at high res, the throughput and framerate are increased - but really not by much. And this is even more wasteful than before (running the timers at full speed), so r15188 switches to "on-demand" timers. (also a bit slower?)