I need to frequently update listview row, What's the best way to find
the row? I wonder how findViewById and findViewByTag work? Do they
walk over all child views and check each view ID or tag? Because this
could be very inefficient. Or they have some sort of hash map to
quickly retrieve the requested view by ID or tag?

Or maybe there is another way of updating listview items? I know
listview reuses views and as you scroll they essentially hand adapter
the same views in getView method.

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