I remember reading about this: 
<a href="http:&#x2F;&#x2F;highscalability.com&#x2F;blog&#x2F;2014&#x2F;2&#x2F;13&#x2F;snabb-switch-skip-the-os-and-get-40-million-requests-per-sec.html" rel="nofollow">http:&#x2F;&#x2F;highscalability.com&#x2F;blog&#x2F;2014&#x2F;2&#x2F;13&#x2F;snabb-switch-skip-...</a>