For small data rates Win64 is actually faster than Linux on the same hardware, however turn up that data rate and you can see where it is headed.
See "PGM Performance.PNG" for graph up to 104,000 packets-per-second. http://miru.hk/tmp/PGM%20Performance.PNG See "PGM Performance-enhance.PNG" for zoomed into below 300 microseconds. http://miru.hk/tmp/PGM%20Performance-enhance.PNG The performance peak of Win64 may be a driver issue, using blocking send & recv based performance utilities shows an bottleneck on one direction with even TCP traffic. -- Steve-o
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