I'm not sure about this, since I've never used Apache::PerlVINC. It seems like it should work, but would probably still affect performance in both. I think Apache::PerlVINC causes the modules to be re-compiled every time, which is a performance hit, and will ruin the copy-on-write shared memory that mod_perl would otherwise benefit from.

In reply to Re^3: different versions of same Perl module in different Apache vhosts by perrin
in thread different versions of same Perl module in different Apache vhosts by agaffney

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