Slow AJAX response in record page with large number of resources

[Twan Goosen]

On the record page, a large number of resources (in particular when identified by a handle) will lead to a slow response when the user clicks the 'technical details' or 'all metadata fields' links before all resource locations have been checked and/or resolved. This happens in consecutive AJAX requests, one at a time. The expansion actions end up at the end of the queue and therefore has to wait for all resources have been processed. The same goes for other AJAX actions, e.g. the permalink.

For example, go to ​http://catalog.clarin.eu/vlo1/vlo/record?q=discan&docId=http_58__47__47_hdl.handle.net_47_1839_47_00-FD9AAF98-5D21-4991-9D79-CD2BA33B5CFB and press 'Show technical fields' immediately after loading.

[Twan Goosen]

In case of a large number of resources, the overview should be paged (e.g. max 20 resources per page)

[Twan Goosen]

​Wicketstuff Async-task may provide a better solution, investigate

[Twan Goosen]

Splitting 3.1 milestone. Most open tickets go to 3.2 so that we can have a release on the short term.

[Twan Goosen]

Fixed in r6191

Response times should also benefit from the fix of #550 in r6192