triggering macro on navigation to new line

All,

I just found :set nolazyredraw, which is *very* nice in speeding up
user interaction time, and which helps immensely with my goal of a
quickfix-like editing mode (see the post that I made earlier), so the
only thing left is if there is a way to trigger an action when you go
to a new line, whether you:

1. search for a pattern
2. do :<lineno>
3. hit j or k, up-arrow, down-arrow

I suppose I could re-map each of these actions but IMO it would be a
lot cleaner if something universal existed. Does vim have something
like this?

thanks much again,

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