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CURLOPT_TCP_NODELAY: now enabled by default

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After a few wasted hours hunting down the reason for slowness during a
TLS handshake that turned out to be because of TCP_NODELAY not being
set, I think we have enough motivation to toggle the default for this
option. We now enable TCP_NODELAY by default and allow applications to
switch it off.

This also makes --tcp-nodelay unnecessary, but --no-tcp-nodelay can be
used to disable it.

Thanks-to: Tim Rühsen
Bug: https://curl.haxx.se/mail/lib-2016-06/0143.html
This commit is contained in:
Daniel Stenberg 2016-06-30 14:56:02 +02:00
parent edeabf741f
commit 4732ca5724
6 changed files with 13 additions and 14 deletions
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4
lib/http2.c
View file

@ -1849,10 +1849,6 @@ CURLcode Curl_http2_setup(struct connectdata *conn)
infof(conn->data, "Connection state changed (HTTP/2 confirmed)\n");
Curl_multi_connchanged(conn->data->multi);
/* switch on TCP_NODELAY as we need to send off packets without delay for
maximum throughput */
Curl_tcpnodelay(conn, conn->sock[FIRSTSOCKET]);
return CURLE_OK;
}

1
lib/url.c
View file

@ -602,6 +602,7 @@ CURLcode Curl_init_userdefined(struct UserDefined *set)
set->tcp_keepintvl = 60;
set->tcp_keepidle = 60;
set->tcp_fastopen = FALSE;
set->tcp_nodelay = TRUE;
set->ssl_enable_npn = TRUE;
set->ssl_enable_alpn = TRUE;