I have 7 webpages for viewing reports on one SharePoint page. It takes a long time to download them. If I open RDL directly, the report loads in 2 seconds. If I download only one web part to view one report, then the web part also loads very quickly.
How to reduce boot time?
All of those UpdatePanels that are designed for lazy loading, AJAX calls, etc., cause part of the problem. Disabling ViewState is not an option as it breaks down web parts.
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