Comment 13 for bug 143657

I've been able to verify the effect by instrumenting the FileStorage.load with a simple counter.

For a current Plone 4.0a5 site the differences are in the hundreds of fewer databases loads. Simply loading the front page for the first time requires about 700 instead of 2000 database loads. Adding a page for the first time still required 230 vs. 100 loads. Over time this effect drops off when the ZODB cache is filled up. The effect will be more noticeable in production sites where objects are frequently not in the cache.