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88 lines
3.2 KiB
Diff
88 lines
3.2 KiB
Diff
From a4d888857ede39a8e2aa5f961048c6362d3a5377 Mon Sep 17 00:00:00 2001
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From: Jay Satiro <raysatiro@yahoo.com>
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Date: Wed, 16 Nov 2016 02:55:30 -0500
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Subject: [PATCH] http2: Use huge HTTP/2 windows
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- Improve performance by using a huge HTTP/2 window size.
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Bug: https://github.com/curl/curl/issues/1102
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Reported-by: afrind@users.noreply.github.com
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Assisted-by: Tatsuhiro Tsujikawa
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---
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docs/TODO | 8 --------
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lib/http2.c | 15 +++++++++++++--
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2 files changed, 13 insertions(+), 10 deletions(-)
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diff --git a/docs/TODO b/docs/TODO
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index c3bc4eb..99c610f 100644
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--- a/docs/TODO
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+++ b/docs/TODO
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@@ -63,7 +63,6 @@
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5.1 Better persistency for HTTP 1.0
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5.2 support FF3 sqlite cookie files
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5.3 Rearrange request header order
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- 5.4 Use huge HTTP/2 windows
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5.5 auth= in URLs
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5.6 Refuse "downgrade" redirects
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5.7 Brotli compression
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@@ -528,13 +527,6 @@ This is not detailed in any FTP specification.
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headers use a default value so only headers that need to be moved have to be
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specified.
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-5.4 Use huge HTTP/2 windows
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-
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- We're currently using nghttp2's default window size which is terribly small
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- (64K). This becomes a bottle neck over high bandwidth networks. We should
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- instead make the window size to be very big (512MB?) as we really don't do
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- much flow control anyway.
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-
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5.5 auth= in URLs
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Add the ability to specify the preferred authentication mechanism to use by
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diff --git a/lib/http2.c b/lib/http2.c
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index 6720984..202ab1b 100644
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--- a/lib/http2.c
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+++ b/lib/http2.c
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@@ -59,6 +59,8 @@
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#define nghttp2_session_callbacks_set_error_callback(x,y)
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#endif
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+#define HTTP2_HUGE_WINDOW_SIZE (1 << 30)
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+
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/*
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* Curl_http2_init_state() is called when the easy handle is created and
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* allows for HTTP/2 specific init of state.
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@@ -965,7 +967,7 @@ static ssize_t data_source_read_callback(nghttp2_session *session,
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*/
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static nghttp2_settings_entry settings[] = {
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{ NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS, 100 },
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- { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, NGHTTP2_INITIAL_WINDOW_SIZE },
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+ { NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE, HTTP2_HUGE_WINDOW_SIZE },
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};
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#define H2_BUFSIZE 32768
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@@ -2031,7 +2033,8 @@ CURLcode Curl_http2_switched(struct connectdata *conn,
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else {
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/* stream ID is unknown at this point */
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stream->stream_id = -1;
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- rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, NULL, 0);
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+ rv = nghttp2_submit_settings(httpc->h2, NGHTTP2_FLAG_NONE, settings,
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+ sizeof(settings) / sizeof(settings[0]));
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if(rv != 0) {
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failf(data, "nghttp2_submit_settings() failed: %s(%d)",
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nghttp2_strerror(rv), rv);
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@@ -2039,6 +2042,14 @@ CURLcode Curl_http2_switched(struct connectdata *conn,
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}
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}
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+ rv = nghttp2_session_set_local_window_size(httpc->h2, NGHTTP2_FLAG_NONE, 0,
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+ HTTP2_HUGE_WINDOW_SIZE);
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+ if(rv != 0) {
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+ failf(data, "nghttp2_session_set_local_window_size() failed: %s(%d)",
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+ nghttp2_strerror(rv), rv);
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+ return CURLE_HTTP2;
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+ }
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+
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/* we are going to copy mem to httpc->inbuf. This is required since
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mem is part of buffer pointed by stream->mem, and callbacks
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called by nghttp2_session_mem_recv() will write stream specific
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