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Changing WP Object Caching during runtime

If I an external object cache (provided by W3TC), but in specific usecases use wp_using_ext_object_cache(false) during Runtime somewhere in the middle of the WP page – Does this change during effect how WP handles Object Caching?

I.e. does WP afterwards ignore the global object cache (i.e. W3TC) and therefore directly take everything from the DB instead of relying on wp_cache_set/add/get?

Thanks!