`restic restore` speeds asymptotically dropping towards zero!

Hello everyone,

I could not wait anymore (even pausing it with kill -STOP so it would be moved to swap, the restic restore process somehow ended up greatly slowing my daily backup job), so I had to abort it with `kill -9’; @fd0, sorry for not being able to wait for your further instructions re: debug.

My next attempt (as soon as I complete one more backup) will be with @ifedorenko’s out-of-order-restore-no-progress tree from PR #2195, as per @764287 recommendation.

Will keep this thread posted.
– Durval.