bzr-git, the git map, fetching revisions, and being very slow

[Stephen J. Turnbull]

Jelmer Vernooij writes:

 > It's unfair to compare imports from git to bazaar with native clones
 > between git repositories. Compare with pulling from a git repository to
 > a git repository using bzr instead.

Of course it's not unfair, because the comparison we should care about
is performance in the user's eyes.  The user may be willing to make
the tradeoff, but the more we say about why they should in the face of
obvious defects less they'll trust us.  Note that that's different
from *explaining* the performance differential, such as "This
operation is sufficiently rare that we put low priority on optimizing
it, and it's a relatively difficult task since we are Bazaar experts,
not git experts.  You should not extrapolate and assume all bzr-git
interactions will have such low performance."