TCP_QUICKACK does fix the worst version of the problem, but doesn't fix the entire problem. Nagles algorithm will still wait for up to one round-trip time befor

TCP_QUICKACK does fix the worst version of the problem, but doesn't fix the entire problem. Nagles algorithm will still wait for up to one round-trip time before sending data (at least as specified in the RFC), which is extra latency with nearly no added value.