The DropDownList is indeed not the best choice when dealing with huge data sets for a couple of reasons. First, as you already noticed - the performance is not so great, because all items are rendered and this could be quite stressful for older machines and/or browsers. The second reason is poor user experience. Finding a specific item among 8000 others with no means of filtering might be a challenging and even frustrating task. In the current scenario I would recommend using the ComboBox widget in combination with server filtering
, thus eliminating both of the possible issues you might have with the DropDownList.
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