Code review comment for lp:~vanvugt/mir/enable-dynamic-queue-scaling

Still needs more manual testing. There's a chance that slightly slow clients like the dash only ever keep up with 60Hz if you give them triple buffers. So theoretically such a pathological case could be made worse by this branch (skip one in every 30 frames, or two skips per second). That would not be good, so needs some eyes on manual testing here.

If there's any doubt, this effort will need to be trashed. And that's OK too. Because regardless of the outcome my next task after this will benefit all clients regardless of their performance profile.