perf: use the cache to compute the obsolete set.
The official "obsolete" computation is switch to using the cache. This provide
noticable speed for operation that does not need to actually access the
obs markers. The part relating to obsolete changeset computation disappear from
the execution profile when it is used.
#require test-repo
$ checkcm() {
> if ! (which check-manifest > /dev/null); then
> echo skipped: missing tool: check-manifest;
> exit 80;
> fi;
> };
$ checkcm
$ cat << EOF >> $HGRCPATH
> [experimental]
> evolution=all
> EOF
Run check manifest:
$ cd $TESTDIR/..
$ check-manifest
lists of files in version control and sdist match