Rather than necro-ing an old thread, I'm starting a new one.
I've continued to track when and where the sluggishness starts to occur on Linux and it is most definitely related to running your project in the debugger multiple times in a single IDE launch session.
I ran another test overnight -
- Launched the IDE, loaded that project, but did not perform any debug runs.
- I did edits, copy/paste, Tab changes, but did not run, for over 4 hours.
- I let the IDE sit untouched until this morning.
- I just tested a bulk copy/paste of 2 controls from one window to a new window with no issues. I was then able to quit without getting the force quit warning.
This is most definitely still related to the number of times that a project is run in the debugger.