Can you add Debounce to the filtering?
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ADMIN EDIT
At the moment, you can use the OnRead to implement custom filtering and also debounce the operations: https://docs.telerik.com/blazor-ui/components/combobox/events#onread and the particular example the article links is shown here: https://docs.telerik.com/blazor-ui/knowledge-base/combo-debounce-onread
You may also want to look at item virtualization in the dropdowns - Follow it here: https://feedback.telerik.com/blazor/1457808-combobox-virtualization
There is also a sample attached of implementing debouncing in a WASM app as a reference too.
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