Merge pull request #36397 from y-yagi/only_clear_cache_when_view_paths_are_specified

Only clear cache when view paths are specified

actionview/lib/action_view/cache_expiry.rb

@@ -22,6 +22,8 @@ def initialize(watcher:)
     def clear_cache_if_necessary
       @mutex.synchronize do
         watched_dirs = dirs_to_watch
+        return if watched_dirs.empty?
+
         if watched_dirs != @watched_dirs
           @watched_dirs = watched_dirs
           @watcher = @watcher_class.new([], watched_dirs) do