When you notice that CPU is unexpectedly overloaded (e.g. when monitoring CPU usage at Timeline page), you may want to identify which part of code is actually consuming CPU resource.
To identify the code consuming CPU resource:
Note: If the refresh is too fast to see the content, unselect Refresh toggle button
[] at the local toolbar to disable refresh.
Alternatively, you can change the period to update on preference page
Window > Preferences > Java > Monitor > Period to update.