Update to irmin.2.8.
Context
Update to irmin.2.8.0
(and associated packages index.1.4.2
, repr.0.5.0
). Associated tezos/opam-repository MR opam-repository!209 (closed).
The new version of irmin helps with the memory consumption during the migration (see #1682 (closed)).
The new version of index
has a better memory usage as well, and allows an increase of an internal cache to 5 its size - the memory is not changed, but it allows for a faster bootstrapping (in our benchmarks the overall time is down from 930s
to 700s
).