"Compiled Qt Quick is an elegant solution to these problems: .qml files as well as accompanying .js files can be translated into intermediate C++ source code. After compilation with a traditional compiler, the code is linked into the application binary. This entirely eliminates the need of deploying QML source code, it reduces the application startup time and allows for a much faster execution on platforms that do not permit Just-in-time compilation."
http://doc.qt.io/QtQuickCompiler/