In terms of feel, you will find Mir 0.26 is the biggest step forward
ever (and that will ever be). Because most of the software lag is now
gone, which you will get a feel for in Unity8;
https://docs.google.com/spreadsheets/d/1RbTVDbx04ohkF4-md3wAlgmxbSI1DttstnT6xdcXhZQ/pubchart?oid=1566479835&format=interactive
Adding to the improved responsiveness is the removal of input resampling
in Mir 0.26, which means apps get input events from your USB mouse at
125Hz instead of 59Hz, and they arrive up to one frame sooner than they
did in Mir 0.25. This means dragging windows is finally buttery smooth.
But we're not done yet. Theoretically optimal latency (allowing for 16ms
of render time and 24ms of LCD hardware latency) in the above chart
would be at about the 40ms line. So there is some improvement possible
still. Plus Xmir and Android's code paths have not been fully optimized
and are about one frame higher than those charted values which are for
native EGL apps on desktop. And more improvement is theoretically
possible after that (e.g.
https://www.khronos.org/registry/OpenGL/extensions/NV/GLX_NV_delay_before_swap.txt).
- Daniel
On 17/02/17 10:29, Daniel van Vugt wrote:
Mir 0.26 is now released and is also released in Ubuntu 17.04 zesty.
https://launchpad.net/mir/0.26/0.26.0
https://launchpad.net/mir/0.26/0.26.1
https://launchpad.net/ubuntu/+source/mir
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