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    find_dependency: Avoid repeating identical dependency searches · fb9a3d0c
    Brad King authored
    Since commit 37da6af1 (find_dependency: Always search dependencies,
    2019-03-29, v3.15.0-rc1~301^2) we search for a package every time it is
    encountered in the transitive dependency graph traversal, even if it has
    been found before.  This was done in case a new visit to a given package
    requests different components than a previous visit.  However, it also
    causes a lot of repeat processing that is unnecessary in the common case
    that all calls share the same set of components (often none).
    
    Restore the logic to avoid repeating the search for an already-found
    package.  Handle differences in components by de-duplicating based on
    the complete `find_package` call arguments.
    
    Fixes: #23685
    fb9a3d0c