ReadonlycountReadonlyjitterSample standard deviation ("jitter"), in milliseconds. 0 if fewer than 2 samples.
ReadonlymaxReadonlymeanArithmetic mean, in milliseconds. 0 if no samples yet.
ReadonlyminReadonlyopReadonlyp50Readonlyp95Readonlyp99
One named op's snapshot, as reported over REST/WS.