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Issue 1: Initial loading performance delay.
Form components takes initial loading of time 20secs when rendering 1000+ controls in a page.
Issue 2: Performance issue when pressing the tab key.
When rendering 1000+ controls on a pagewhile clicking the tab key, a performance issue occurs.
Please find the sample below.
https://www.syncfusion.com/downloads/support/directtrac/330309/ze/SlowControls_4bda5f15