QueryableCollectionView performance question

[StackOverflowed]

I've noticed a strange performance issue with QueryableCollectionView (which it seems is being used as the default CollectionView for the RadGridView). If I add just a single item to the list, QueryableCollectionView ends up calling PopulateListInternal, which will iterate through ALL of the items in the in my ObservableCollection. Why is this the case?

[Stefan Dobrev]

Hello StackOverflowed,

You are absolutely right about this current behavior of QueryableCollectionView which is less than optimal. We are currently in the process of revising the implementation and we will provide a better (faster) solution for collection change handling no matter if it is through source collection or its public facing IEditableCollectionView implementation.

Thanks for you feedback. It helps make sure that we are on the right track with the implementation we are currently implementing.

Best wishes,
Stefan Dobrev
the Telerik team

[StackOverflowed]

Any updates on this yet?

[Nedyalko Nikolov]

Hi StackOverflowed,

Unfortunately this task is not so trivial and I cannot commit that we will manage to finish it for the upcoming service pack. We are doing our best to introduce it with the next major release (a.k.a. 2011.Q1).
Sorry for the inconvenience caused.

Greetings,
Nedyalko Nikolov
the Telerik team

[Sergej Mertens]

Hi,

any updates on this? We have huge lags in this when adding new items. In our scenario each add takes approx. 400ms which is extremely slow!

We use Version 2011.1.627.40

Thanks,
Daniel

[Vlad]

Hello Daniel,

 Please try our latest official version - Q2 2011 SP1. We've managed to include even more optimizations for our upcoming Q3 2011 release (after two weeks).  

Greetings,
Vlad
the Telerik team