xcb: avoid unnecessary InternAtom requests

QXcbConnection::internAtom() creates the atom if it does not exist. The
lifetime of an atom is not tied to the interning client. Atoms remain
defined until server reset (lost connection, restart).

So create the atom once via QXcbConnection::initializeAllAtoms(), and
later fetch the atom value from local array, instead of repeating
InternAtom requests.

Change-Id: I3cae21895febad6e5daf8c32e72612202baaad64
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index 75275f6fd2..84551fd74b 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -1964,6 +1964,10 @@ static const char * xcb_atomnames = {
     "_COMPIZ_DECOR_DELETE_PIXMAP\0"
     "_COMPIZ_TOOLKIT_ACTION\0"
     "_GTK_LOAD_ICONTHEMES\0"
+    "AT_SPI_BUS\0"
+    "EDID\0"
+    "EDID_DATA\0"
+    "XFree86_DDC_EDID1_RAWDATA\0"
     // \0\0 terminates loop.
 };