ParagraphList slowness

[John Levon]

This :

    148 int LyXText::workWidth(Inset const * inset) const
    149 {
    150         ParagraphList::iterator par = std::find(ownerParagraphs().begin(),
    151                                                 ownerParagraphs().end(),
    152                                                 *inset->parOwner());
    153         //lyx::Assert(par);


is really doing us no favours in buffer load time. It's near the top of the
profiles.

I guess parOwner() should be returning an iterator or something.

btw, is there a hash map we can use from somewhere ? Right at the top is the qt
frontend's char width caching which currently is std::map<Uchar, int> - pretty
silly

regards
john