Setup/Settings/Assist now has options to enable/disable Assist++ features that could cause performance problems:
Automatic scans of source files - if active, ide automatically scans/updates info about all files. If off, you need to invoke Assist/Reparse all source files to get any assist action...
Automatic assist - if active, assist popup opens when '.', '->', ... is written in the text. If off, you can only get that popup by pressing Ctrl+Space
Rescan file when editing - when active, assist rescans current file while editing (after 1s of inactivity). If off, can be invoked through Assist menu/Rescan file.