rust: less set lookups in AncestorsIterator
This uses the boolean return of `HashSet::insert()` to factor
pairs of contains()/insert() into a single insert()
On the mozilla-central repository (450k changesets), I get about a bit more
than 10% better medians in perfancestors (taking the mean of three runs)
Best run for parent changeset:
! wall 0.106474 comb 0.110000 user 0.110000 sys 0.000000 (median of 93)
Best run for this changeset:
! wall 0.093191 comb 0.090000 user 0.090000 sys 0.000000 (median of 100)
Differential Revision: https://phab.mercurial-scm.org/D5942
#require test-repo slow docker
$ . "$TESTDIR/helpers-testrepo.sh"
$ testrepohgenv
Ensure debuild doesn't run the testsuite, as that could get silly.
$ DEB_BUILD_OPTIONS=nocheck
$ export DEB_BUILD_OPTIONS
$ OUTPUTDIR=`pwd`
$ export OUTPUTDIR
$ cd "$TESTDIR"/..
$ make docker-debian-jessie > $OUTPUTDIR/build.log 2>&1
$ cd $OUTPUTDIR
$ ls *.deb
mercurial-common_*.deb (glob)
mercurial_*.deb (glob)
We check debian package contents with portable tools so that when
we're on non-debian machines we can still test the packages that are
built using docker.
main deb should have .so but no .py
$ ar x mercurial_*.deb
$ tar tf data.tar* | egrep '(localrepo|parsers)'
./usr/lib/python2.7/dist-packages/mercurial/parsers*.so (glob)
mercurial-common should have .py but no .so or .pyc
$ ar x mercurial-common_*.deb
$ tar tf data.tar* | egrep '(localrepo|parsers)'
./usr/lib/python2.7/dist-packages/mercurial/pure/parsers.py
./usr/lib/python2.7/dist-packages/mercurial/localrepo.py