While I like the synactic sugar that Carp::Assert provides I can't decide whether or not to use it:

• The module's author points out that using the module can slow down your code because its assertions are implemented as subroutines
• The Pragmatic Programmers recommend leaving assertions turned on. If you do this with Carp::Assert, you'll end up with lots more subroutine calls in your code.
• Perl allows you to write EXPR or die 'error message' - easy to read but no performance hit.
• C's assertion mechanism is implemented using a preprocessor macro, so would assert be a good candidate for a source filter in Perl?
• Finally, how does Perl6 address this problem?

Thanks for any input.

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