Comment 8 for bug 143657

I created a branch and applied a modified version of the patch to it at svn+ssh://svn.zope.org/repos/main/ExtensionClass/branches/hannosch-lp-143657

I tried to validate the decrease in reference loading (or rather unghostifying). Using some simple tests I wasn't able to see any difference between this version and the current trunk. So this will need some actual verification and tests before I'd consider it ready to be merged into trunk.