Why does gradient2 ignore the effect of didDrop on latency

[cao2358]

If we drop the request, the delay will be almost 0. At this time, onSample will not be able to increase the limit very well, but will keep dropping, and then let more requests be dropped.

[Jon-Gaara]

There is a minRttThreshold in WindowedLimit. By setting its value, it can work better.