Surely serious HFT systems bypass TCP altogether now days. In that world, every ... | Hacker News

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Reason077 8 months ago | parent | context | favorite | on: It's always TCP_NODELAY

Surely serious HFT systems bypass TCP altogether now days. In that world, every millisecond of latency can potentially cost a lot of money.

These are the guys that use microwave links to connect to exchanges because fibre-optics have too much latency.

jm__87 8 months ago [–]

They still need to send their orders to an exchange, which is often done with FIX protocol over TCP (some exchanges have binary protocols which are faster than FIX, but the ones I'm aware of still use TCP)

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