curl_multi_fdset.3: emphasize curl_multi_timeout
... even when there's no socket to wait for, the timeout can still be very short.
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@ -5,7 +5,7 @@
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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@ -58,9 +58,10 @@ libcurl set. When libcurl returns -1 in \fImax_fd\fP, it is because libcurl
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currently does something that isn't possible for your application to monitor
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with a socket and unfortunately you can then not know exactly when the current
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action is completed using select(). You then need to wait a while before you
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proceed and call \fIcurl_multi_perform(3)\fP anyway. How long to wait? We
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suggest 100 milliseconds at least, but you may want to test it out in your own
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particular conditions to find a suitable value.
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proceed and call \fIcurl_multi_perform(3)\fP anyway. How long to wait? Unless
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\fIcurl_multi_timeout(3)\fP gives you a lower number, we suggest 100
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milliseconds or so, but you may want to test it out in your own particular
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conditions to find a suitable value.
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When doing select(), you should use \fIcurl_multi_timeout(3)\fP to figure out
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how long to wait for action. Call \fIcurl_multi_perform(3)\fP even if no
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