The full generation of the site (including pagination, feeds, etc) is till too time consuming for a fast turn around for local development. For this reason we will try to just create the blog pages in dev mode and only in production mode rebuild the full site.

Emmanuel Bernard:

In dev mode, we would only generate the blog pages and ideally the pagination if that’s fast enough (otherwise we would have no index page pointing to the blog entry).
Tags and feed would not be computed. That mode needs to have the site servicing working as well. That should be fast enough for the writing time. We can even ignore entries older than one year to speed things up even more.