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I'm trying to use QML Profiler to find out what is slowing my program down, but when I start it, I get this message:
QML Profiler: Connecting to debug server at 127.0.0.1:50540 ... QML Profiler: Resolving host QML Profiler: Establishing network connection ... QML Profiler: Network connection dropped
which repeats for a few second, and eventually a popup appears saying:
Could not connect to the in-process QML Profiler. Do you want to retry?
I have checked Enable QML Debugging and Profiling in qmake build steps and rebuilt, and I also have Enable QML checked in Debugger Settings.
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Setting Up QML Debugging The process of setting up debugging for Qt Quick projects depends on the type of the project: Qt Quick UI or Qt Quick Application. To debug Qt Quick UI projects: Select Projects, and then select the QML check box in the Run Settings, to enable QML debugging.
I met the same issue today when remote device profiling, it's caused by the qmlprofiler port was already been used.
I found the error message:
QML Debugger: Unable to listen to port 10000
then check port on my device:
lsof -i :10000, there indeed a process is using port 10000.
so I changed the qmlprofiler port to 10001 in below, the problem solved:
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