Also, with iperf 2, -c localhost seems to perform the same on Windows as it does for Linux. So skeptical that the cygwin overhead is very large. A binary is he

Also, with iperf 2, -c localhost seems to perform the same on Windows as it does for Linux. So skeptical that the cygwin overhead is very large. A binary is here https://sourceforge.net/projects/iperf2/files/ https://sourceforge.net/projects/iperf2/files/