Compilation of qmls take the same time for compiled and not compiled qmls

We are trying to reduce boot time of our HMI application. Compiling of qmls takes about 4s which is significant high. So we decided to put them into resourced in precompiled view. But it hasn't any effect, compilation still takes 4s. We've measured boot time with logs and with qml profiler.

We put qmls into resources as qrc file. Loading of root qml starts from qrc:\ path.

We've tried compile our application with default resource compression and without compression.

So it seems like Qt issue. Please investigate it.