QML is very efficient. Much of custom QML code ones write actually compiles to C++[1]. All the code of Qt Quick components are written in C++ as well. I'm now c

QML is very efficient. Much of custom QML code ones write actually compiles to C++[1]. All the code of Qt Quick components are written in C++ as well. I'm now creating a block editor in Qt C++ (model) and QML (view) that is 4x faster than that fastest comparable native app on macOS[2]. So, yes, it's possible to write very efficient code with QML. [1] https://www.qt.io/blog/qml-type-compilation https://www.qt.io/blog/qml-type-compilation [2] https://www.get-plume.com/ https://www.get-plume.com/