I compiled qt5.14 from source successfully on Tx2. I am observing huge performance degradation in applciation that was working well with default qt 5.9.5 for tx2. I compiled qt in release mode.
Since qt is from 3rdparty and looks like 5.9.5 works well, it is more like an issue in 5.14 release. May see if other users have experience of using 5.14 and share suggestion.