Actually I regard the current behavior as a feature. Using a stopwatch and a slide-rule I can estimate to within 100 objects, how many values are indexed in a catalog by measuring the time it takes to draw the indexes page.
Please do not remove this most valued feature! -Casey On Thursday 17 July 2003 04:35 pm, Dieter Maurer wrote: > Chris Withers wrote at 2003-7-17 11:12 +0100: > > Has anyone noticed that the ZCatalog Indexes tab crawls if you have loads of > > objects indexed. > > > > My guess is that some types of index take way too long to figure out how many > > objects are indexed. Anyone know which index types those could be? > > The one that provide the correct number of indexed objects > (rather than just the number of indexed terms). > > Because the same object can be indexed under several terms, > determining the number of indexed objects requires to > build the union of all the index values. This almost surely > has quadratic (worst case) runtime characteristics. > > > BTW, would anyone object if I removed that object count, since it's not often > > very useful... > > You probably should replace it with the size of the index (i.e. > the number of index terms). > > Formerly, the index overview displayed this information but > under a buggy "# objects" title. Someone fixed this for most > indexes, they now show the number of objects but at a high > price. > > I suggest to change the title to "# index terms" and > revert for the indexes to the old behaviour. > > > Others pointed out, that also the size determination for an > index may be expensive. However, it is at most linear in the number > (rather than quadratic) and all recently created indexes now > use "BTrees.Length" to maintain their size (which gives constant time). > > Having a feeling how large an index is is valuable information. > > > Dieter > > _______________________________________________ > Zope-Dev maillist - [EMAIL PROTECTED] > http://mail.zope.org/mailman/listinfo/zope-dev > ** No cross posts or HTML encoding! ** > (Related lists - > http://mail.zope.org/mailman/listinfo/zope-announce > http://mail.zope.org/mailman/listinfo/zope ) > _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
