Made it to the summit at double speed.

  :strawberry:x14
  3:17:46
  deaths:1981

It's still a surprisingly tricky topic because simply measuring the frame duration (or using rAF's timestamp) gives significant timing jitter - which in turn introduces microstutter (and the other problem is that some browsers still limit timer precision to whole milliseconds due to the Specter/Meltdown fallout - but at least here the random jitter is useful because averaging over enough frames gives you the precise frame duration back, eg 16.667 or 8.333 ms instead of 15<=>17 or 7<=>9 ms