I've read about it in Perl Best Practices book and I've tried it. It looks very promising (especially with Readonly::XS helper module).

But Devel::DProf show it's still use tie()ed scalar (and so call FETCH() on each scalar access) even with Readonly::XS installed.

This was sadly news, because I feel like with Readonly::XS it should just 'mark' SV as read-only and doesn't tie() it. :-(

In reply to Re^3: Import constants as scalar instead of bareword sub by powerman
in thread Import constants as scalar instead of bareword sub by powerman

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