I think the biggest performance gain on the PHP side is use of a PHP accelerator like APC -- I haven't done much experimentation with this (there can be weird side effects occasionally)
but at least at the Zend Framework level, it should be well supported.
From: Joe Atzberger [email@example.com]
Sent: Monday, December 30, 2013 12:29 PM
Cc: vufind-tech Tech
Subject: Re: [VuFind-Tech] Experience with multiple libraries on the same vufind core sought
We started towards a database-driven consolidation of customized modules/themes, but for now we just install a different VuFind instance and manage the differences with version control. I would be interested to see the performance of various
different configurations profiled, but I suspect the main differences will still be things like caching and Solr performance. There are advantages to having, for example, all the various libraries' cover images cached in the same pool.
I'm not enough of a PHP tuner to know where in the framework part of the stack any comparable gains can be achieved.