KNOWN_BUGS: slow connect to localhost on Windows Closes #2281
diff --git a/docs/KNOWN_BUGS b/docs/KNOWN_BUGS index 9757c2c..0c5e68f 100644 --- a/docs/KNOWN_BUGS +++ b/docs/KNOWN_BUGS
@@ -88,6 +88,7 @@ 11.3 c-ares deviates from stock resolver on http://1346569778 11.4 HTTP test server 'connection-monitor' problems 11.5 Connection information when using TCP Fast Open + 11.6 slow connect to localhost on Windows 12. LDAP and OpenLDAP 12.1 OpenLDAP hangs after returning results @@ -638,6 +639,19 @@ See https://github.com/curl/curl/issues/1332 +11.6 slow connect to localhost on Windows + + When connecting to "localhost" on Windows, curl will resolve the name for + both ipv4 and ipv6 and try to connect to both happy eyeballs-style. Something + in there does however make it take 200 millseconds to succeed - which is the + HAPPY_EYEBALLS_TIMEOUT define exactly. Lowering that define speeds up the + connection, suggesting a problem in the HE handling. + + If we can *know* that we're talking to a local host, we should lower the + happy eyeballs delay timeout for IPv6 (related: hardcode the "localhost" + addresses, mentioned in TODO). Possibly we should reduce that delay for all. + + https://github.com/curl/curl/issues/2281 12. LDAP and OpenLDAP
