Very slow processing of attribute-filter.xml with many AttributeFilterPolicy elements

[Rod Widdowson]

> My best guess if it's that much faster than V2 is that Spring fixed
> something. Rod can comment eventually, but I don't think he fixed
> anything
> that revolutionary in the parsing code.

I'm away from code, but as I Recall V2 grabs a lock Ex and then parses, V3 parses and then locks and swaps.  Certainly I cleaned up the locking semantics while I was there, but Apart from that the code is pretty much the same from V2 to V3...

/R