BenchmarkChanRTT-4               5000000               345 ns/op               0 B/op          0 allocs/op
BenchmarkNetPipeRTT-4            2000000               873 ns/op               0 B/op          0 allocs/op
BenchmarkTCPloopback-4            300000              4929 ns/op               0 B/op          0 allocs/op
BenchmarkLinkTCPRTT-4              50000             27201 ns/op           11091 B/op         43 allocs/op