David Bremner <david@tethera.net> writes: > From: Austin Clements <amdragon@mit.edu> > > Previously, we updated the database copy of a message on every call to > _notmuch_message_sync, even if nothing had changed. In particular, > this always happens on a thaw, so a freeze/thaw pair with no > modifications between still caused a database update. > > We only modify message documents in a handful of places, so keep track > of whether the document has been modified and only sync it when > necessary. This will be particularly important when we add message > revision tracking. This patch makes some sense without the rest of lastmod series, so I merged it early to get some testing. d