[deergomoo]

This tripped me up recently too. Somehow I'd got it in my head that Vue (2) would selectively re-render sub-trees within a given component if no dependencies within the tree had changed. I had a table functioning as a datasheet (not even that big—about 20 columns by 100 rows) that was absolutely chugging and I couldn't work out why, because nothing within the table was changing very often. Extracted it to its own component and all the performance issues went away.