quickjs-tart

quickjs-based runtime for wallet-core logic
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happy-eyeballs-timeout-ms.md (1043B)

      1 ---
      2 c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
      3 SPDX-License-Identifier: curl
      4 Long: happy-eyeballs-timeout-ms
      5 Arg: <ms>
      6 Help: Time for IPv6 before IPv4
      7 Added: 7.59.0
      8 Category: connection timeout
      9 Multi: single
     10 See-also:
     11   - max-time
     12   - connect-timeout
     13 Example:
     14   - --happy-eyeballs-timeout-ms 500 $URL
     15 ---
     16 
     17 # `--happy-eyeballs-timeout-ms`
     18 
     19 Set the timeout for Happy Eyeballs.
     20 
     21 Happy Eyeballs is an algorithm that attempts to connect to both IPv4 and IPv6
     22 addresses for dual-stack hosts, giving IPv6 a head-start of the specified
     23 number of milliseconds. If the IPv6 address cannot be connected to within that
     24 time, then a connection attempt is made to the IPv4 address in parallel. The
     25 first connection to be established is the one that is used.
     26 
     27 The range of suggested useful values is limited. Happy Eyeballs RFC 6555 says
     28 "It is RECOMMENDED that connection attempts be paced 150-250 ms apart to
     29 balance human factors against network load." libcurl currently defaults to
     30 200 ms. Firefox and Chrome currently default to 300 ms.