Slowdown in Retrieving tags from firebase in Real-time

MIT App Inventor Help
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I conducted a little experiment on the MIT Firebase server to see if timestamped entries could be caught one by one in a Data Changed event.

It worked for me, using BlueStacks multi-emulators ...
Animation

blocks
blocks773×2040 143 KB

firebase_data_changed_timestamped.aia (4.8 KB)

Designer
Designer816×585 83.4 KB

Note: My List Picker Elements lag behind my Tag Lists because in the interest of speed I only refresh my List Picker Elements when I use the List Pickers, not when new data arrives.