Hi,

Episerver Find is the best way to do this but since you are not want to use that then you can use cast method and it will eliminate the items-

Please see this -

IContentLoader _loader = ServiceLocator.Current.GetInstance<IContentLoader>();
IEnumerable<BlogCommentPage> pages = _loader.GetChildren<PageType>(parentPageRef).Cast<BlogCommentPage>();;
int count = pages.Count();

or you can refer below article but that is not recommended way to do this -

http://joelabrahamsson.com/get-child-pages-filtered-by-page-type/

I believe you can try to use to find pages with criteria (please google it, I cant paste a link). I think there should be a way of getting pages by parent ID.

If it will not work, I think only caching is something that can improve the performance for your query.

I don't know your particular use case, so this may or may not work for you.

A totally different approach would be to have a hidden field on the parent page itself. A scheduled job can run daily/hourly and can populate this field for you. That way you are forcing the CMS do the work for you than putting the onus on the front-end users. Again - not sure if this is the right approach without knowing your particular use case.

Good idea, but it also can be improved by using published event instead of job.