Doc: Add recommendation for optimizing large asset files

Building apps with large asset files added to .qrc files
requires huge amounts of memory, so they should be avoided
or included as external binary resources.

Fixes: QDS-4943
Change-Id: I8e4b3630b0543a33547c3477145adf3b2f47b758
Reviewed-by: Johanna Vanhatapio <johanna.vanhatapio@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

doc/qtcreator/src/qtquick/qtquick-from-qmlproject-to-pro.qdoc

@@ -55,8 +55,10 @@
     from the Qt UI Quick project to the application project.
 
     You can use the \c RESOURCES option in the project configuration file to
-    automatically add all the QML files and related assets to a Qt resource
+    automatically add all the QML files and related assets to a
-    file.
+    \l{The Qt Resource System}{Qt resource collection file (.qrc)}. However,
+    large files should be included as external binary resources instead of
+    compiling them into the binary.
 
     The wizard automatically adds the \c QML_IMPORT_PATH option to the project
     file for specifying the required
@@ -132,6 +134,21 @@
 
     \quotefile progressbar/main.cpp
 
+    \section1 Handling Large Data Files
+
+    Graphical assets used in the UI, such as images, effects, or 3D scenes
+    are a typical cause for performance problems in UIs. Even building the
+    application requires huge amounts of memory if you try to include large
+    asset files, such as 100-MB 3D models or 64-MB textures, into the \c .qrc
+    file for compiling them into the binary.
+
+    First try to optimize your assets, as described in \l{Optimizing Designs}
+    and \l {Creating Optimized 3D Scenes}.
+
+    If you really need large assets, they should either be loaded directly from
+    the file system or use the Qt resource system in the dynamic way. For more
+    information, see \l{The Qt Resource System} in the Qt documentation.
+
     \section1 Adding Custom Fonts
 
     To \l{Using Custom Fonts}{use custom fonts} from the Qt Quick UI project,