Hi Billa, what is your operating system? Various tasks including extrusion does the processing work in a separate process and then uses interprocess communication to send the result back to the main process. This helps keep some potentially long calculations to be cancelable.

But if your system has something on it that either interferes with the interprocess communication or makes it slower to start up a new process then you will get the kind of lag that you are describing.

On Windows if you have anti-virus set up try adjusting its settings to tell it not to interfere with both moi.exe and moi_commandprocessor.exe .

If you're on Mac try looking under System Preferences > Security & Privacy > Privacy > Accessibility > "Allow the apps below to control your computer" and if MoI is listed there remove it or uncheck it.

- Michael