quantile q means what's the value v so that all q of the values have value <= v
TODO since we typically get 99%, 99.9%, 75%, etc. it should be faster to count the other way
ok can be false for two reasons:
(in either case, we can't compute the summaries)
* the total count was 0
* the total count overflowed (but we set to 1 so you can tell the difference)
type Report struct {
Min uint32// in millis Mean uint32// in millis Median uint32// in millis P75 uint32// in millis P90 uint32// in millis Max uint32// in millis Count uint32}
if count is 0 then there was no input, so statistical summaries are invalid
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