Granularity: Introduce primitive-typed bucketStart, increment methods. #10904
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Saves creation of unnecessary DateTime objects in timestamp_floor and
timestamp_ceil expressions.
I was running a query that had a
group by floor(__time to year)
in it and was greeted by the following flame graph:33% of the time is spent on
DateTime.<init>
. It's not necessary, because the PeriodGranularity code is doing the hard work on the primitive milliseconds.