4 ms·

Yeah, let's just remove TCP_NODELAY and fuck all latency-sensitive applications.

• perryizgr8 4y ago
  Actual latency sensitive apps can always use SOCK_RAW and implement their own TCP. In fact, for serious low latency you need to bypass the entire kernel stack too, like DPDK.
  • taneq 4y ago
    “I know, instead of using TCP_NODELAY we can just roll our own ad-hoc reimplementation of TCP!”
    • withinboredom 4y ago
      For serious though. TCP has a handshake to make a connection. UDP doesn’t and if you’re going for low-latency, you probably don’t want retransmission anyway, since if you miss the packet it’s too late to do anything about it. If you need the guarantees from TCP, you probably aren’t actually solving a low-latency problem.
      • lanstin 4y ago
        Low latency SQL transactions? Not microseconds, but a ms or two is doable unless you have transient connections or Nagle + delayed acks.