The reason why I asked is because I've been using Heroku for a few applications and I always seem to notice a slight delay when I navigate to a URL (they don't

The reason why I asked is because I've been using Heroku for a few applications and I always seem to notice a slight delay when I navigate to a URL (they don't keep your server running if no one has accessed the app in over an hour) and I noticed a delay when I visited your page so I was merely curious. What's concierge mode?