QProcess - Processing output in asynchronous signals

[Nubcake]

I use a QProcess object along with the asynchronous signals to process data continously. I start my QProcess using start and when readyReadStandardOutput is received, I do lengthy processing inside the associated slot but I've noticed that this causes the GUI to hang/block during this processing.

How can I process data without blocking the GUI when I get the readyReadStandardOutput signal?

Some psuedocode

Task task;
task.asyncProcess();

void Task::asyncProcess()
{
  m_process.setProgram("task.exe");
  m_process.start();

...
QObject::connect(&m_process, &QProcess::readyReadStandardOutput, this, [this]()
    {
      // Length processing in here which causes GUI to block
});

}

[eyllanesc]

@Nubcake execute the "Length processing" in another thread

[Nubcake]

@eyllanesc Do you mean run QProcess inside a QThread and use the synchronous signals instead?

[nagesh]

@Nubcake at present "lengthy processing" is done in the main/GUI thread context.
Which is causing the GUI to block. Offload the processing part to another thread as suggested by @eyllanesc.

create the new thread instance and move the "task" object to that thread using moveToThread.

[eyllanesc]

@Nubcake No, QProcess does not block anything, what blocks is the processing (the "Length processing") that you do of the output. That part run it in a new thread using QtConcurrent.