[server] improve the speed of setting relations between entities (closes #1625257)
The main idea is to add methods equivalent to session.add_relation and
repository.glob_add_relation which handle several relations in one call. Speed
gain results from:
* using cursor.executemany to run SQL statements
* factorizing some code which otherwise has to be performed for each relation,
such as context manager creation before calling hooks or to enable security,
creation of the EditedEntity instance (when several inlined relations are set
on a single entity, and consequently when refreshing the cached entity)
benchmark runs 1.1x faster for non inlined entities and 125x faster for inlined
entities :-)
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
import gc, types, weakref
from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema
listiterator = type(iter([]))
IGNORE_CLASSES = (
type, tuple, dict, list, set, frozenset, type(len),
weakref.ref, weakref.WeakKeyDictionary,
listiterator,
property, classmethod,
types.ModuleType, types.FunctionType, types.MethodType,
types.MemberDescriptorType, types.GetSetDescriptorType,
)
def _get_counted_class(obj, classes):
for cls in classes:
if isinstance(obj, cls):
return cls
raise AssertionError()
def gc_info(countclasses,
ignoreclasses=IGNORE_CLASSES,
viewreferrersclasses=(), showobjs=False, maxlevel=1):
gc.collect()
gc.collect()
counters = {}
ocounters = {}
for obj in gc.get_objects():
if isinstance(obj, countclasses):
cls = _get_counted_class(obj, countclasses)
try:
counters[cls.__name__] += 1
except KeyError:
counters[cls.__name__] = 1
elif not isinstance(obj, ignoreclasses):
try:
key = '%s.%s' % (obj.__class__.__module__,
obj.__class__.__name__)
except AttributeError:
key = str(obj)
try:
ocounters[key] += 1
except KeyError:
ocounters[key] = 1
if isinstance(obj, viewreferrersclasses):
print ' ', obj, referrers(obj, showobjs, maxlevel)
return counters, ocounters, gc.garbage
def referrers(obj, showobj=False, maxlevel=1):
objreferrers = _referrers(obj, maxlevel)
try:
return sorted(set((type(x), showobj and x or getattr(x, '__name__', '%#x' % id(x)))
for x in objreferrers))
except TypeError:
s = set()
unhashable = []
for x in objreferrers:
try:
s.add(x)
except TypeError:
unhashable.append(x)
return sorted(s) + unhashable
def _referrers(obj, maxlevel, _seen=None, _level=0):
interesting = []
if _seen is None:
_seen = set()
for x in gc.get_referrers(obj):
if id(x) in _seen:
continue
_seen.add(id(x))
if isinstance(x, types.FrameType):
continue
if isinstance(x, (CubicWebRelationSchema, CubicWebEntitySchema)):
continue
if isinstance(x, (list, tuple, set, dict, listiterator)):
if _level >= maxlevel:
pass
#interesting.append(x)
else:
interesting += _referrers(x, maxlevel, _seen, _level+1)
else:
interesting.append(x)
return interesting