Hi, I found an interesting linux library to compare with ZMQ. It looks as pure software, and exactly what's written, its 'utilize a standard BSD sockets'. 2.5 us TCP latency impresses! :) So it's still some space to be faster without FPGAs.
Best regards, daniel http://www.highfrequencytraders.com/article/756/mellanox-message-acceleration-software-enables-lowestlatency-trading (...) Mellanox VMA 5.0 delivers sustainable latency under loads of over 2.5 million packets per second and dramatically improves UDP latency to under 2.0 microseconds and transparent sockets TCP latency to under 2.5 microseconds, nearly two times better than competitive offerings. (...) VMA is a dynamically-linked user-space Linux library for accelerating messaging and streaming traffic. Applications that utilize standard BSD sockets use the library to offload network processing from a server’s CPU, with no application changes required. http://www.mellanox.com/related-docs/prod_acceleration_software/VMA_EN.pdf
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