Code review comment for lp:~vanvugt/unity8/more-smooth-less-lag

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Daniel van Vugt (vanvugt) wrote :


I would agree with your logic, however the last couple of years have taught me that the human brain can and does observe latencies at a much higher resolution than a 60Hz display. It takes practice, but eventually the differences become obvious.

So why am I sceptical of measurements from automation? Because we (the Mir team) have regularly messed up our automation of performance measurement. First was when racarr proposed changes with tests that reported lower latency but using your own eyes you could see the latency was actually higher. And second more recently was the ClientLatency acceptance test, which was taken as absolute truth at the time, only to later be shown as completely incorrect in the results it reports (fixed in Mir 0.16.0).

So our history so far has made me trust my eyes more than our automation.

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