On Mon, 15 Nov 2021, Woody via curl-library wrote:
It takes one second to give the timeout error, but it waits then 11 seconds
to return control.
I debugged into the curl-library and I discovered that when
multi_handle_timeout() detects a timeout, it calls the Curl_resolver_kill().
The Curl_resolver_kill() awaits then 11 seconds for Curl_thread_join().
I believe this is the same issue mentioned here:
https://curl.se/docs/knownbugs.html#Multi_perform_hangs_waiting_for
... I think we should consider providing a way for libcurl to *not* wait for
that final thread and continue anyway and that way avoid this "hang" - even
if that then also risks causing a memory leak.
--
/ daniel.haxx.se
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