Here's a little fact we should admit up front: Plone is slow. Not as slow as it used to be, not as slow that it's useless, but neither Zope nor Plone have ever been sold on speed. In general, Plone is a content production system, not a content delivery system, and has been written for features and ease-of-use - not for blazing speed. (We use caching to improve speed, or separate delivery platforms altogether.) http://plone.org/documentation/manual/plone-developer-reference/patterns/referencemanual-all-pages
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