Last modified: 2014-11-12 11:50:52 UTC
Like in title, they should visible only when editing template itself, but not on its talkpage.
See example on talkpage - https://en.wikipedia.org/w/index.php?title=Template_talk:Infobox_book&action=edit§ion=7
It is possible to transclude each page, so each page should have profiling. It is also possible to profile the used template and not the template alone. This is relevant for long loading articles or talk pages.