[rleigh]

This was really painful. Back when I was a Debian developer tracking unstable, I would update every evening and it would sometimes take multiple hours to complete. The fsync performance is a truly awful design flaw, and while eatmydata does make it faster, it's a terrible and dangerious hack! (Which everyone used!)

I even had to add eatmydata support to the schroot tool as a command-prefix option to allow every command to be run via eatmydata when using btrfs snapshots. (I've since dropped btrfs support entirely; it was too unreliable with large snapshot turnover rapidly unbalancing the filesystem. Unusable in production.)