I’m happy to report I’ve uploaded version 1 of a module which works around the performance bugs in StyledText.RTFData, using a combination of my code and the declares from Massimo. Please see <https://xojo.com/issue/25533> for the code.
When operating directly on StyledText objects, this class still has to use the very slow Paragrap(indx) call.
So, if it all possible, it’s much faster to do this: