BlueTooth (LE) proximity detection speed?

Hi guys!

I'm trying to find information about how fast a BLE detection is...

For example, if I would attach a BLE tag/beacon to my dog and it ran past the master, would that see it?

It doesn't need to handshake and all that, just the proximity detection I'm interested in.

Maybe you know of projects like this I can look into?

Looking for anything that can clarify this :slight_smile:

Thank you!