Mercurial > hg
view tests/test-mq-qclone-http.t @ 17970:0b03454abae7
ancestor: faster algorithm for difference of ancestor sets
One of the major reasons rebase is slow in large repositories is
the computation of the detach set: the set of ancestors of the
changesets to rebase not in the destination parent. This is currently
done via a revset that does two walks all the way to the root of
the DAG. Instead of doing that, to find ancestors of a set <revs>
not in another set <common> we walk up the tree in reverse revision
number order, maintaining sets of nodes visited from <revs>, <common>
or both.
For the common case where the sets are close both topologically and
in revision number (relative to repository size), this has been
found to speed up rebase by around 15-20%. When the nodes are farther
apart and the DAG is highly branching, it is harder to say which
would win.
Here's how long computing the detach set takes in a linear repository
with over 400000 changesets, rebasing near tip:
Rebasing across 4 changesets
Revset method: 2.2s
New algorithm: 0.00015s
Rebasing across 250 changesets
Revset method: 2.2s
New algorithm: 0.00069s
Rebasing across 10000 changesets
Revset method: 2.4s
New algorithm: 0.019s
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Mon, 26 Nov 2012 11:46:51 -0800 |
parents | f62ed3d90377 |
children | 7a9cbb315d84 |
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$ "$TESTDIR/hghave" killdaemons || exit 80 hide outer repo $ hg init $ echo "[extensions]" >> $HGRCPATH $ echo "mq=" >> $HGRCPATH $ mkdir webdir $ cd webdir $ hg init a $ hg --cwd a qinit -c $ echo a > a/a $ hg --cwd a ci -A -m a adding a $ echo b > a/b $ hg --cwd a addremove adding b $ hg --cwd a qnew -f b.patch $ hg --cwd a qcommit -m b.patch $ hg --cwd a log --template "{desc}\n" [mq]: b.patch a $ hg --cwd a/.hg/patches log --template "{desc}\n" b.patch $ root=`pwd` $ cd .. test with recursive collection $ cat > collections.conf <<EOF > [paths] > /=$root/** > EOF $ hg serve -p $HGPORT -d --pid-file=hg.pid --webdir-conf collections.conf \ > -A access-paths.log -E error-paths-1.log $ cat hg.pid >> $DAEMON_PIDS $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT '?style=raw' 200 Script output follows /a/ /a/.hg/patches/ $ hg qclone http://localhost:$HGPORT/a b requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 3 changes to 3 files updating to branch default 3 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg --cwd b log --template "{desc}\n" a $ hg --cwd b qpush -a applying b.patch now at: b.patch $ hg --cwd b log --template "{desc}\n" imported patch b.patch a test with normal collection $ cat > collections1.conf <<EOF > [paths] > /=$root/* > EOF $ hg serve -p $HGPORT1 -d --pid-file=hg.pid --webdir-conf collections1.conf \ > -A access-paths.log -E error-paths-1.log $ cat hg.pid >> $DAEMON_PIDS $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT1 '?style=raw' 200 Script output follows /a/ /a/.hg/patches/ $ hg qclone http://localhost:$HGPORT1/a c requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 3 changes to 3 files updating to branch default 3 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg --cwd c log --template "{desc}\n" a $ hg --cwd c qpush -a applying b.patch now at: b.patch $ hg --cwd c log --template "{desc}\n" imported patch b.patch a test with old-style collection $ cat > collections2.conf <<EOF > [collections] > $root=$root > EOF $ hg serve -p $HGPORT2 -d --pid-file=hg.pid --webdir-conf collections2.conf \ > -A access-paths.log -E error-paths-1.log $ cat hg.pid >> $DAEMON_PIDS $ "$TESTDIR/get-with-headers.py" localhost:$HGPORT2 '?style=raw' 200 Script output follows /a/ /a/.hg/patches/ $ hg qclone http://localhost:$HGPORT2/a d requesting all changes adding changesets adding manifests adding file changes added 2 changesets with 2 changes to 2 files requesting all changes adding changesets adding manifests adding file changes added 1 changesets with 3 changes to 3 files updating to branch default 3 files updated, 0 files merged, 0 files removed, 0 files unresolved 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg --cwd d log --template "{desc}\n" a $ hg --cwd d qpush -a applying b.patch now at: b.patch $ hg --cwd d log --template "{desc}\n" imported patch b.patch a test --mq works and uses correct repository config $ hg --cwd d outgoing --mq comparing with http://localhost:$HGPORT2/a/.hg/patches searching for changes no changes found [1] $ hg --cwd d log --mq --template '{rev} {desc|firstline}\n' 0 b.patch $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS