Commits on Oct 3, 2024

1. Fix slowTickIfNecessary with infrequently used EWMA …

   EWMA.tickIfNecessary does an amount of work that is linear to the amount of time that has passed since the last time the EWMA was ticked. For infrequently used EWMA this can lead to pauses observed in the 700-800 millisecond range after a few hundred days.
   
   It's not really necessary to perform every tick as all that is doing is slowly approaching the smallest representable positive number in a double. Instead pick a number close to zero and if the number of ticks required is greater then that don't do the ticks just set the value to close to zero immediately. Actually approaching the smallest representable number is still measurably slow and not particularly useful.
   
   To avoid changing the observed output of the EWMA (which previous was only 0.0 if never used) set it close to Double.MIN_NORMAL rather then to 0.0

   

   aweisberg authored and joschi committed Oct 3, 2024
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