On my opinion first must check repos first jessie, jessie-updates, sid and so) before download the lists.
- Bug#815149: debmirror: High cpu usage. Corcodel Marian
- Bug#815149: debmirror: High cpu usage. Colin Watson
- Bug#815149: debmirror: High cpu usage. Corcodel Marian
- Bug#815149: debmirror: High cpu usage. Corcodel Marian
- Bug#815149: debmirror: High cpu usage. Corcodel Marian
- Bug#815149: debmirror: High cpu usage. Corcodel Marian