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Viewing changes to bzrlib/tests/blackbox/test_reconcile.py

  • Committer: John Arbash Meinel
  • Date: 2009-10-17 04:43:14 UTC
  • mto: This revision was merged to the branch mainline in revision 4756.
  • Revision ID: john@arbash-meinel.com-20091017044314-nlvrrqnz0f2wzcp4
change the GroupcompressBlock code a bit.
If the first decompress request is big enough, just decompress everything.
And when we do that, let go of the decompressobj.

After digging through the zlib code, it looks like 1 zlib stream object
contains a 5kB internal state, and another 4*64kB buffers. (about 260kB
of total state.)
That turns out to be quite a lot if you think about it.


In the case of branching a copy of 'bzr.dev' locally, this turned out
to be 383MB w/ bzr.dev and 345MB w/ only this patch. (So ~11% of peak).

Also, this was 'unreferenced' memory, because it is hidden in the
zlib internal state in working buffers. So it wasn't memory that Meliae
could find. \o/.

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bzrlib/tests/blackbox/test_reconcile.py
 
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# Copyright (C) 2006 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""Black box tests for the reconcile command."""
 
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import bzrlib
 
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import bzrlib.bzrdir as bzrdir
 
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from bzrlib.inventory import Inventory
 
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import bzrlib.repository as repository
 
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from bzrlib.tests import TestCaseWithTransport
 
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from bzrlib.tests import TestUIFactory
 
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from bzrlib.transport import get_transport
 
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import bzrlib.ui as ui
 
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class TrivialTest(TestCaseWithTransport):
 
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    def setUp(self):
 
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        super(TrivialTest, self).setUp()
 
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        self.old_format = bzrdir.BzrDirFormat.get_default_format()
 
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        self.old_ui_factory = ui.ui_factory
 
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        self.addCleanup(self.restoreDefaults)
 
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        ui.ui_factory = TestUIFactory()
 
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    def restoreDefaults(self):
 
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        ui.ui_factory = self.old_ui_factory
 
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    def test_trivial_reconcile(self):
 
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        t = bzrdir.BzrDir.create_standalone_workingtree('.')
 
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        (out, err) = self.run_bzr('reconcile')
 
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        if t.branch.repository._reconcile_backsup_inventory:
 
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            does_backup_text = "Inventory ok.\n"
 
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        else:
 
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            does_backup_text = ""
 
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        self.assertEqualDiff(out, "Reconciling branch %s\n"
 
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                                  "revision_history ok.\n"
 
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                                  "Reconciling repository %s\n"
 
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                                  "%s"
 
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                                  "Reconciliation complete.\n" %
 
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                                  (t.branch.base,
 
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                                   t.bzrdir.root_transport.base,
 
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                                   does_backup_text))
 
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        self.assertEqualDiff(err, "")
 
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    def test_does_something_reconcile(self):
 
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        t = bzrdir.BzrDir.create_standalone_workingtree('.')
 
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        # an empty inventory with no revision will trigger reconciliation.
 
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        repo = t.branch.repository
 
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        inv = Inventory(revision_id='missing')
 
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        inv.root.revision='missing'
 
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        repo.lock_write()
 
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        repo.start_write_group()
 
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        repo.add_inventory('missing', inv, [])
 
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        repo.commit_write_group()
 
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        repo.unlock()
 
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        (out, err) = self.run_bzr('reconcile')
 
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        if repo._reconcile_backsup_inventory:
 
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            does_backup_text = (
 
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                "Backup Inventory created.\n"
 
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                "Inventory regenerated.\n")
 
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        else:
 
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            does_backup_text = ""
 
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        expected = ("Reconciling branch %s\n"
 
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                    "revision_history ok.\n"
 
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                    "Reconciling repository %s\n"
 
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                    "%s"
 
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                    "Reconciliation complete.\n" %
 
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                    (t.branch.base,
 
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                     t.bzrdir.root_transport.base,
 
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                     does_backup_text))
 
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        self.assertEqualDiff(expected, out)
 
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        self.assertEqualDiff(err, "")