diff -r 058bb3dc685f -r 0b59724cb3f2 _gcdebug.py
--- a/_gcdebug.py	Mon Jan 04 18:40:30 2016 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,112 +0,0 @@
-# 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/>.
-from __future__ import print_function
-
-import gc, types, weakref
-
-from cubicweb.schema import CubicWebRelationSchema, CubicWebEntitySchema
-try:
-    from cubicweb.web.request import _NeedAuthAccessMock
-except ImportError:
-    _NeedAuthAccessMock = None
-
-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,
-    )
-if _NeedAuthAccessMock is not None:
-    IGNORE_CLASSES = IGNORE_CLASSES + (_NeedAuthAccessMock,)
-
-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))
-    garbage = [repr(obj) for obj in gc.garbage]
-    return counters, ocounters, 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