On Windows by default search bar will take 1-3 seconds to load. Hovewer it is possible to enable instant search bar.
Search bar will be loaded instantly.
{% hint style="warning" %} Premiere Pro UI might flash after you execute Excalibur command. From my test it happens when you have another application window behind Premiere Pro. {% endhint %}
There is a bug in Premiere API that wont allow to use Japanese or other languages that use IME in a search bar.
Panel mode is primarly made as a workaround for those cases.
Drawback would be that panel size can't be defined by user.
As a benefit: the panel could be placed anywhere on a screen and its position will be remembered.