4 ms·

makes me wonder about SACKS again: https://www.reddit.com/r/networking/comments/yf3d6u/how_common_are_sacks_in_tcp/ https://www.reddit.com/r/networking/comments

• jsnell 4y ago
  SACKs are the second most important/useful TCP extension after window scaling. SACKs have had basically universal support for more than a decade (like, 95% of the traffic on the public internet negotiated SACKs in 2012). Anyone writing a new production TCP stack without SACKs is basically committing malpractice.