docs/cmdline: change to .md for cmdline docs
- switch all invidual files documenting command line options into .md,
as the documentation is now markdown-looking.
- made the parser treat 4-space indents as quotes
- switch to building the curl.1 manpage using the "mainpage.idx" file,
which lists the files to include to generate it, instead of using the
previous page-footer/headers. Also, those files are now also .md
ones, using the same format. I gave them underscore prefixes to make
them sort separately:
_NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md,
_VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md,
_OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md,
_EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md
- updated test cases accordingly
Closes #12751
2024-01-21 06:18:43 +08:00
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---
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2023-01-02 20:51:48 +08:00
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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2022-06-14 06:12:03 +08:00
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SPDX-License-Identifier: curl
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2018-01-31 08:33:51 +08:00
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Long: happy-eyeballs-timeout-ms
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2024-03-25 17:02:30 +08:00
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Arg: <ms>
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Help: Time for IPv6 before IPv4
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2018-01-31 08:33:51 +08:00
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Added: 7.59.0
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2024-07-04 19:38:18 +08:00
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Category: connection timeout
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2022-10-18 16:39:43 +08:00
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Multi: single
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docs/cmdline: change to .md for cmdline docs
- switch all invidual files documenting command line options into .md,
as the documentation is now markdown-looking.
- made the parser treat 4-space indents as quotes
- switch to building the curl.1 manpage using the "mainpage.idx" file,
which lists the files to include to generate it, instead of using the
previous page-footer/headers. Also, those files are now also .md
ones, using the same format. I gave them underscore prefixes to make
them sort separately:
_NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md,
_VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md,
_OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md,
_EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md
- updated test cases accordingly
Closes #12751
2024-01-21 06:18:43 +08:00
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See-also:
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- max-time
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- connect-timeout
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Example:
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- --happy-eyeballs-timeout-ms 500 $URL
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2018-01-31 08:33:51 +08:00
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---
|
docs/cmdline: change to .md for cmdline docs
- switch all invidual files documenting command line options into .md,
as the documentation is now markdown-looking.
- made the parser treat 4-space indents as quotes
- switch to building the curl.1 manpage using the "mainpage.idx" file,
which lists the files to include to generate it, instead of using the
previous page-footer/headers. Also, those files are now also .md
ones, using the same format. I gave them underscore prefixes to make
them sort separately:
_NAME.md, _SYNOPSIS.md, _DESCRIPTION.md, _URL.md, _GLOBBING.md,
_VARIABLES.md, _OUTPUT.md, _PROTOCOLS.md, _PROGRESS.md, _VERSION.md,
_OPTIONS.md, _FILES.md, _ENVIRONMENT.md, _PROXYPREFIX.md,
_EXITCODES.md, _BUGS.md, _AUTHORS.md, _WWW.md, _SEEALSO.md
- updated test cases accordingly
Closes #12751
2024-01-21 06:18:43 +08:00
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# `--happy-eyeballs-timeout-ms`
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2021-08-09 01:02:02 +08:00
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Happy Eyeballs is an algorithm that attempts to connect to both IPv4 and IPv6
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addresses for dual-stack hosts, giving IPv6 a head-start of the specified
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number of milliseconds. If the IPv6 address cannot be connected to within that
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time, then a connection attempt is made to the IPv4 address in parallel. The
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first connection to be established is the one that is used.
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2018-01-31 08:33:51 +08:00
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The range of suggested useful values is limited. Happy Eyeballs RFC 6555 says
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"It is RECOMMENDED that connection attempts be paced 150-250 ms apart to
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balance human factors against network load." libcurl currently defaults to
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200 ms. Firefox and Chrome currently default to 300 ms.
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