Nested catch and throw do not seem to work properly

'Faster'... may be due to the fact that with 'logically massive' use of exceptions overall code code size is smaller and with less code to run it is faster. Elimination of if/then/else and returning and distinction of error/exception codes (on top of application codes) slims code to implementaton of the good path and reduces issues handling code to a minimum and only in the (call hierarchy stack/) layer where of interest. @asez73, as a practitioner of exception paradigm you'd like to share your rational.