There are also various trace modes, I'd go for manipulating DB::sub() to toggle the mode and/or callbacks for Spreadsheet calls.

update

see also https://perldoc.perl.org/perldebguts#Debugger-Internals

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^3: Perl Debugger degrades performance when reading large spreadsheet by LanX
in thread Perl Debugger degrades performance when reading large spreadsheet by boleary

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