From c20e88fdced470feb3eab8be4dc80d9ac20e919c Mon Sep 17 00:00:00 2001
From: Uli Schlachter <psychon@znc.in>
Date: Sat, 7 Aug 2010 13:28:44 +0200
Subject: [PATCH] Avoid some round-trips on startup

This makes awesome prefetch some of the data it needs during startup to avoid
some useless round-trips to the server.

Signed-off-by: Uli Schlachter <psychon@znc.in>
---
 awesome.c | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/awesome.c b/awesome.c
index 6baa023d..6c848db8 100644
--- a/awesome.c
+++ b/awesome.c
@@ -26,8 +26,12 @@
 #include <unistd.h>
 #include <signal.h>
 
-#include <xcb/xtest.h>
+#include <xcb/bigreq.h>
+#include <xcb/randr.h>
+#include <xcb/shape.h>
 #include <xcb/xcb_event.h>
+#include <xcb/xinerama.h>
+#include <xcb/xtest.h>
 
 #include "awesome.h"
 #include "spawn.h"
@@ -427,10 +431,12 @@ main(int argc, char **argv)
     if(xcb_connection_has_error(globalconf.connection))
         fatal("cannot open display");
 
-    /* check for xtest extension */
-    const xcb_query_extension_reply_t *xtest_query;
-    xtest_query = xcb_get_extension_data(globalconf.connection, &xcb_test_id);
-    globalconf.have_xtest = xtest_query->present;
+    /* Prefetch all the extensions we might need */
+    xcb_prefetch_extension_data(globalconf.connection, &xcb_big_requests_id);
+    xcb_prefetch_extension_data(globalconf.connection, &xcb_test_id);
+    xcb_prefetch_extension_data(globalconf.connection, &xcb_randr_id);
+    xcb_prefetch_extension_data(globalconf.connection, &xcb_xinerama_id);
+    xcb_prefetch_extension_data(globalconf.connection, &xcb_shape_id);
 
     /* initialize dbus */
     a_dbus_init();
@@ -475,6 +481,14 @@ main(int argc, char **argv)
     /* Set the default xerror handler */
     xutil_error_handler_catch_all_set(&globalconf.evenths, xerror, NULL);
 
+    /* Prefetch the maximum request length */
+    xcb_prefetch_maximum_request_length(globalconf.connection);
+
+    /* check for xtest extension */
+    const xcb_query_extension_reply_t *xtest_query;
+    xtest_query = xcb_get_extension_data(globalconf.connection, &xcb_test_id);
+    globalconf.have_xtest = xtest_query->present;
+
     /* Allocate the key symbols */
     globalconf.keysyms = xcb_key_symbols_alloc(globalconf.connection);
     xcb_get_modifier_mapping_cookie_t xmapping_cookie =