HFT engineers share kernel-bypass tricks — disable delayed ACKs, bypass NIC buffers to shave microseconds

- Traders and HFT engineers on X highlighted practical kernel bypass tactics: disable delayed ACKs, use DPDK or Solarflare OpenOnload, and pin CPUs to avoid jitter. - Posts also recommended NIC hardware timestamping, NUMA‑aware allocation and revisiting routing logic as a hidden bottleneck. - These practitioner notes codify common low‑latency moves you’d qualify in execution racks before adopting user‑space networking broadly. (x.com) (x.com)