diff --git a/Lib/asyncio/graph.py b/Lib/asyncio/graph.py
index 7e85e08c4291a06..e240c6dd77d1245 100644
--- a/Lib/asyncio/graph.py
+++ b/Lib/asyncio/graph.py
@@ -58,7 +58,8 @@ def _build_graph_for_future(
     while coro is not None:
         if hasattr(coro, 'cr_await'):
             # A native coroutine or duck-type compatible iterator
-            st.append(FrameCallGraphEntry(coro.cr_frame))
+            if coro.cr_frame is not None:
+                st.append(FrameCallGraphEntry(coro.cr_frame))
             coro = coro.cr_await
         elif hasattr(coro, 'ag_await'):
             # A native async generator or duck-type compatible iterator
diff --git a/Lib/asyncio/tasks.py b/Lib/asyncio/tasks.py
index 498eec3f31b292b..f432cf0afa895a2 100644
--- a/Lib/asyncio/tasks.py
+++ b/Lib/asyncio/tasks.py
@@ -562,9 +562,11 @@ def __init__(self, aws, timeout):
         self._timeout_handle = None
 
         loop = events.get_event_loop()
+        self._cur_task = current_task()
         todo = {ensure_future(aw, loop=loop) for aw in set(aws)}
         for f in todo:
             f.add_done_callback(self._handle_completion)
+            futures.future_add_to_awaited_by(f, self._cur_task)
         if todo and timeout is not None:
             self._timeout_handle = (
                 loop.call_later(timeout, self._handle_timeout)
@@ -595,6 +597,7 @@ def __next__(self):
     def _handle_timeout(self):
         for f in self._todo:
             f.remove_done_callback(self._handle_completion)
+            futures.future_discard_from_awaited_by(f, self._cur_task)
             self._done.put_nowait(None)  # Sentinel for _wait_for_one().
         self._todo.clear()  # Can't do todo.remove(f) in the loop.
 
@@ -602,6 +605,7 @@ def _handle_completion(self, f):
         if not self._todo:
             return  # _handle_timeout() was here first.
         self._todo.remove(f)
+        futures.future_discard_from_awaited_by(f, self._cur_task)
         self._done.put_nowait(f)
         if not self._todo and self._timeout_handle is not None:
             self._timeout_handle.cancel()
diff --git a/Lib/configparser.py b/Lib/configparser.py
index 3c452afe8ade485..88015ef60865698 100644
--- a/Lib/configparser.py
+++ b/Lib/configparser.py
@@ -618,7 +618,8 @@ class RawConfigParser(MutableMapping):
     _OPT_TMPL = r"""
         (?P<option>                        # very permissive!
             (?:(?!{delim})\S)*             # non-delimiter non-whitespace
-            (?:\s+(?:(?!{delim})\S)+)*)    # optionally more words
+            (?:(?:(?!{delim})\s)+          # optionally more
+             (?:(?!{delim})\S)+)*)         #   space-separated words
         \s*(?P<vi>{delim})\s*              # any number of space/tab,
                                            # followed by any of the
                                            # allowed delimiters,
@@ -628,7 +629,8 @@ class RawConfigParser(MutableMapping):
     _OPT_NV_TMPL = r"""
         (?P<option>                        # very permissive!
             (?:(?!{delim})\S)*             # non-delimiter non-whitespace
-            (?:\s+(?:(?!{delim})\S)+)*)    # optionally more words
+            (?:(?:(?!{delim})\s)+          # optionally more
+             (?:(?!{delim})\S)+)*)         #   space-separated words
         \s*(?:                             # any number of space/tab,
         (?P<vi>{delim})\s*                 # optionally followed by
                                            # any of the allowed
diff --git a/Lib/test/test_asyncio/test_graph.py b/Lib/test/test_asyncio/test_graph.py
index 928b618fe5c55b7..2c5bb2e8f52e668 100644
--- a/Lib/test/test_asyncio/test_graph.py
+++ b/Lib/test/test_asyncio/test_graph.py
@@ -298,6 +298,68 @@ async def main(t1, t2):
             ]
         ])
 
+    async def test_stack_as_completed(self):
+        # gh-156523: as_completed() must record the awaiting task
+        stack_for_inner = None
+
+        async def inner():
+            await asyncio.sleep(0)
+            nonlocal stack_for_inner
+            stack_for_inner = capture_test_stack()
+
+        async def main(t):
+            for f in asyncio.as_completed([t]):
+                await f
+
+        t = asyncio.create_task(inner(), name='inner')
+        await main(t)
+        self.assertFalse(t._asyncio_awaited_by)
+
+        self.assertEqual(stack_for_inner[0], [
+            'T<inner>',
+            ['s capture_test_stack', 'a inner'],
+            [
+                ['T<anon>',
+                    ['a get', 'a _wait_for_one', 'a main',
+                     'a test_stack_as_completed'],
+                    []
+                ]
+            ]
+        ])
+
+    async def test_stack_as_completed_timeout(self):
+        # gh-156523: the awaiting task must be dropped when as_completed() times out
+        stack_for_inner = None
+
+        async def inner():
+            nonlocal stack_for_inner
+            stack_for_inner = capture_test_stack()
+            await asyncio.sleep(3600)
+
+        async def main(t):
+            with self.assertRaises(TimeoutError):
+                for f in asyncio.as_completed([t], timeout=0.01):
+                    await f
+
+        t = asyncio.create_task(inner(), name='inner')
+        await main(t)
+        self.assertFalse(t._asyncio_awaited_by)
+        t.cancel()
+        with self.assertRaises(asyncio.CancelledError):
+            await t
+
+        self.assertEqual(stack_for_inner[0], [
+            'T<inner>',
+            ['s capture_test_stack', 'a inner'],
+            [
+                ['T<anon>',
+                    ['a get', 'a _wait_for_one', 'a main',
+                     'a test_stack_as_completed_timeout'],
+                    []
+                ]
+            ]
+        ])
+
     async def test_stack_task(self):
 
         stack_for_inner = None
@@ -422,6 +484,24 @@ def test_capture_call_graph_non_future(self):
         with self.assertRaises(TypeError):
             asyncio.capture_call_graph("not a future")
 
+    async def test_call_graph_finished_task(self):
+        # gh-156408: the call graph must not record a finished coroutine's None frame
+        async def boom():
+            raise ValueError
+
+        done = asyncio.create_task(asyncio.sleep(0), name='done')
+        failed = asyncio.create_task(boom(), name='failed')
+        cancelled = asyncio.create_task(asyncio.Event().wait(), name='cancelled')
+        cancelled.cancel()
+        await asyncio.gather(done, failed, cancelled, return_exceptions=True)
+
+        for task in (done, failed, cancelled):
+            with self.subTest(task=task.get_name()):
+                buf = io.StringIO()
+                asyncio.print_call_graph(task, file=buf)
+                self.assertEqual(asyncio.capture_call_graph(task).call_stack, ())
+                self.assertIn(f"name={task.get_name()!r}", buf.getvalue())
+
     async def test_capture_call_graph_no_current_task(self):
         results = []
 
diff --git a/Lib/test/test_configparser.py b/Lib/test/test_configparser.py
index 4783943f71a1092..7d1e68fe38100ef 100644
--- a/Lib/test/test_configparser.py
+++ b/Lib/test/test_configparser.py
@@ -43,7 +43,7 @@ class CfgParserTestCaseClass:
     default_section = configparser.DEFAULTSECT
     interpolation = configparser._UNSET
 
-    def newconfig(self, defaults=None):
+    def newconfig(self, defaults=None, **kwargs):
         arguments = dict(
             defaults=defaults,
             allow_no_value=self.allow_no_value,
@@ -56,6 +56,7 @@ def newconfig(self, defaults=None):
             default_section=self.default_section,
             interpolation=self.interpolation,
         )
+        arguments.update(kwargs)
         instance = self.config_class(**arguments)
         return instance
 
@@ -358,6 +359,32 @@ def test_basic(self):
                 the larch {0[1]} 1
             """.format(self.delimiters)))
 
+    @support.subTests('data', [
+        'foo bar=baz',
+        'foo   bar=baz',
+        'foo=bar=baz',
+        'foo = bar=baz',
+        'foo\t \t=\t \tbar=baz',
+    ])
+    def test_space_delimiter(self, data):
+        # gh-156353: Space should be accepted as a delimiter
+        cf = self.newconfig(delimiters=(' ', '='))
+        cf.read_string(f"[all]\n{data}")
+        self.assertEqual(cf.options('all'), ['foo'])
+        self.assertEqual(cf.get('all', 'foo'), 'bar=baz')
+
+    @support.subTests('delimiter', ' =:;#x\t\0\N{RS}\N{CEDILLA}\N{CAT}')
+    @support.subTests('space_before', ['', ' ', '\t', ' \t'])
+    @support.subTests('space_after', ['', ' ', '\t', ' \t'])
+    def test_any_delimiter(self, delimiter, space_before, space_after):
+        cf = self.newconfig(
+            delimiters=(delimiter,),
+            inline_comment_prefixes=None,
+        )
+        cf.read_string(f"[all]\nfoo{space_before}{delimiter}{space_after}bar=baz")
+        self.assertEqual(cf.options('all'), ['foo'])
+        self.assertEqual(cf.get('all', 'foo'), 'bar=baz')
+
     def test_basic_from_dict(self):
         config = {
             "Foo Bar": {
@@ -1991,8 +2018,8 @@ class ConvertersTestCase(BasicTestCase, unittest.TestCase):
 
     config_class = configparser.ConfigParser
 
-    def newconfig(self, defaults=None):
-        instance = super().newconfig(defaults=defaults)
+    def newconfig(self, defaults=None, **kwargs):
+        instance = super().newconfig(defaults=defaults, **kwargs)
         instance.converters['list'] = lambda v: [e.strip() for e in v.split()
                                                  if e.strip()]
         return instance
diff --git a/Misc/NEWS.d/next/Library/2026-04-04-14-25-43.gh-issue-148085.o97yTo.rst b/Misc/NEWS.d/next/Library/2026-04-04-14-25-43.gh-issue-148085.o97yTo.rst
new file mode 100644
index 000000000000000..55cb29a4e83a4c7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-04-04-14-25-43.gh-issue-148085.o97yTo.rst
@@ -0,0 +1,6 @@
+Speed up :meth:`~datetime.date.timetuple` and :meth:`~datetime.date.strftime`
+by caching the ``time.struct_time`` and ``time.strftime`` lookups, and
+:meth:`~datetime.datetime.today` by reading the clock directly instead of
+calling :func:`time.time`. Patching :mod:`time` after importing
+:mod:`datetime` no longer affects these methods. Patch by Maurycy
+Pawłowski-Wieroński.
diff --git a/Misc/NEWS.d/next/Library/2026-08-26-02-30-00.gh-issue-156353.abcdef.rst b/Misc/NEWS.d/next/Library/2026-08-26-02-30-00.gh-issue-156353.abcdef.rst
new file mode 100644
index 000000000000000..0dd925cf596277a
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-08-26-02-30-00.gh-issue-156353.abcdef.rst
@@ -0,0 +1 @@
+Fix :mod:`configparser` parsing when using whitespace in *delimiters*.
diff --git a/Misc/NEWS.d/next/Library/2026-08-26-12-48-10.gh-issue-156408.-Yd0k7.rst b/Misc/NEWS.d/next/Library/2026-08-26-12-48-10.gh-issue-156408.-Yd0k7.rst
new file mode 100644
index 000000000000000..62c92838b5c1266
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-08-26-12-48-10.gh-issue-156408.-Yd0k7.rst
@@ -0,0 +1,2 @@
+Fix :func:`asyncio.print_call_graph` raising :exc:`AttributeError` when
+called on a task that has already finished.
diff --git a/Misc/NEWS.d/next/Library/2026-08-28-18-10-25.gh-issue-156523.llJqo9.rst b/Misc/NEWS.d/next/Library/2026-08-28-18-10-25.gh-issue-156523.llJqo9.rst
new file mode 100644
index 000000000000000..c1c95d76c0d23bb
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-08-28-18-10-25.gh-issue-156523.llJqo9.rst
@@ -0,0 +1,2 @@
+Fix :func:`asyncio.as_completed` not recording the awaiting task in the call
+graph.
diff --git a/Modules/_datetimemodule.c b/Modules/_datetimemodule.c
index cd02b298b406e6a..ec71a89a2b04ec6 100644
--- a/Modules/_datetimemodule.c
+++ b/Modules/_datetimemodule.c
@@ -52,6 +52,9 @@ typedef struct {
 
     /* The interned Unix epoch datetime instance */
     PyObject *epoch;
+
+    PyObject *time_struct_time;
+    PyObject *time_strftime;
 } datetime_state;
 
 /* The module has a fixed number of static objects, due to being exposed
@@ -1892,10 +1895,12 @@ wrap_strftime(PyObject *object, PyObject *format, PyObject *timetuple,
     assert(object && format && timetuple);
     assert(PyUnicode_Check(format));
 
-    PyObject *strftime = PyImport_ImportModuleAttrString("time", "strftime");
-    if (strftime == NULL) {
+    PyObject *current_mod = NULL;
+    datetime_state *st = GET_CURRENT_STATE(current_mod);
+    if (st == NULL) {
         return NULL;
     }
+    PyObject *strftime = st->time_strftime;
 
     /* Scan the input format, looking for %z/%Z/%f escapes, building
      * a new format.  Since computing the replacements for those codes
@@ -2055,7 +2060,7 @@ wrap_strftime(PyObject *object, PyObject *format, PyObject *timetuple,
     Py_XDECREF(zreplacement);
     Py_XDECREF(colonzreplacement);
     Py_XDECREF(Zreplacement);
-    Py_XDECREF(strftime);
+    RELEASE_CURRENT_STATE(st, current_mod);
     return result;
 
  Error:
@@ -2068,41 +2073,26 @@ wrap_strftime(PyObject *object, PyObject *format, PyObject *timetuple,
  * from C.  Perhaps they should be.
  */
 
-/* Call time.time() and return its result (a Python float). */
-static PyObject *
-time_time(void)
-{
-    PyObject *result = NULL;
-    PyObject *time = PyImport_ImportModuleAttrString("time", "time");
-
-    if (time != NULL) {
-        result = PyObject_CallNoArgs(time);
-        Py_DECREF(time);
-    }
-    return result;
-}
-
 /* Build a time.struct_time.  The weekday and day number are automatically
  * computed from the y,m,d args.
  */
 static PyObject *
 build_struct_time(int y, int m, int d, int hh, int mm, int ss, int dstflag)
 {
-    PyObject *struct_time;
-    PyObject *result;
-
-    struct_time = PyImport_ImportModuleAttrString("time", "struct_time");
-    if (struct_time == NULL) {
+    PyObject *current_mod = NULL;
+    datetime_state *st = GET_CURRENT_STATE(current_mod);
+    if (st == NULL) {
         return NULL;
     }
 
-    result = PyObject_CallFunction(struct_time, "((iiiiiiiii))",
+    PyObject *result = PyObject_CallFunction(st->time_struct_time,
+                         "((iiiiiiiii))",
                          y, m, d,
                          hh, mm, ss,
                          weekday(y, m, d),
                          days_before_month(y, m) + d,
                          dstflag);
-    Py_DECREF(struct_time);
+    RELEASE_CURRENT_STATE(st, current_mod);
     return result;
 }
 
@@ -3337,7 +3327,11 @@ datetime_date_today_impl(PyTypeObject *type)
                            type);
     }
 
-    PyObject *time = time_time();
+    PyTime_t ts;
+    if (PyTime_Time(&ts) < 0) {
+        return NULL;
+    }
+    PyObject *time = PyFloat_FromDouble(PyTime_AsSecondsDouble(ts));
     if (time == NULL) {
         return NULL;
     }
@@ -7449,6 +7443,8 @@ init_state(datetime_state *st, PyObject *module, PyObject *old_module)
             .us_per_week = Py_NewRef(st_old->us_per_week),
             .seconds_per_day = Py_NewRef(st_old->seconds_per_day),
             .epoch = Py_NewRef(st_old->epoch),
+            .time_struct_time = Py_NewRef(st_old->time_struct_time),
+            .time_strftime = Py_NewRef(st_old->time_strftime),
         };
         return 0;
     }
@@ -7493,6 +7489,15 @@ init_state(datetime_state *st, PyObject *module, PyObject *old_module)
         return -1;
     }
 
+    st->time_struct_time = PyImport_ImportModuleAttrString("time", "struct_time");
+    if (st->time_struct_time == NULL) {
+        return -1;
+    }
+    st->time_strftime = PyImport_ImportModuleAttrString("time", "strftime");
+    if (st->time_strftime == NULL) {
+        return -1;
+    }
+
     return 0;
 }
 
@@ -7502,6 +7507,9 @@ traverse_state(datetime_state *st, visitproc visit, void *arg)
     /* heap types */
     Py_VISIT(st->isocalendar_date_type);
 
+    Py_VISIT(st->time_struct_time);
+    Py_VISIT(st->time_strftime);
+
     return 0;
 }
 
@@ -7517,6 +7525,8 @@ clear_state(datetime_state *st)
     Py_CLEAR(st->us_per_week);
     Py_CLEAR(st->seconds_per_day);
     Py_CLEAR(st->epoch);
+    Py_CLEAR(st->time_struct_time);
+    Py_CLEAR(st->time_strftime);
     return 0;
 }