Modifying TCP window size for PushPull

A single file of 1024MB was downloaded using PushPull using different TCP window sizes.
There is the option to enable/disable TCP window scaling in the configuration file
/etc/sysctl.conf and to set the maximum transfer window. A maximum transfer rate of
~20.1MB/s is achieved for TCP window sizes > 2048 Bytes. The smallest window size found
for PushPull to be in an operational state was 256 Bytes giving an average transfer rate of
~11.2MB/s.