This was mentioned a long time ago on the old forum:
"The biggest change that we made internally was to the way the history (breadcrumbs) are implemented. It turned out that the way we were doing this (caching the OIDs for the objects on the session) was very time expensive due to database
hits, especially as the history grew. Now we just cache the URLs to those objects and its much faster. One nice side effect of that change is that we will (in a future release) be able to extend the breadcrumb history to include query results, which will be
Any estimation on when query results would be available in the history? It will be a great usability enhancement and probably not too time consuming to implement, the way I see it.