If you're trying to update a module that doesn't exist, then your query will run through your 10 repositories, taking an inordinate amount of time. All you need are a couple of slow repositories to make the process slow down to a crawl. I had much the same problem as you - there's always someone out there who's moving slowly, and the more repositories you query, the more likely you'll hit a slow one (or more). I now use only two, and this works quite well for me.