Construct GeneratorUsage

Kay Hayen

2024-04-26 13:13

Performance Diagrams

Source Code with Construct    return x


for x in itertools.repeat(None, 50000):
    calledRepeatedly()

print("OK.")

#     Python test originally created or extracted from other peoples work. The
#     parts from me are licensed as below. It is at least Free Software where
#     it's copied from other people. In these cases, that will normally be
#     indicated.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.

Source Code without Construct    return x


for x in itertools.repeat(None, 50000):
    calledRepeatedly()

print("OK.")

#     Python test originally created or extracted from other peoples work. The
#     parts from me are licensed as below. It is at least Free Software where
#     it's copied from other people. In these cases, that will normally be
#     indicated.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.

Context Diff of Source Code

	Construct			Baseline
	13			13
	14	gen = generator()		14	gen = generator()
	15			15
	16	x = next(gen)		16	x = next(gen)
	17	# construct_begin		17	# construct_begin
t	18	next(gen)	t	18
	19	# construct_end		19
	20			20
	21	return x		21	return x
	22			22
	23			23
	24	for x in itertools.repeat(None, 50000):		24	for x in itertools.repeat(None, 50000):

Context Diff of Generated Code

	Construct			Baseline
	117	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		117	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	118	PyObject *exception_type = NULL;		118	PyObject *exception_type = NULL;
	119	PyObject *exception_value = NULL;		119	PyObject *exception_value = NULL;
	120	PyTracebackObject *exception_tb = NULL;		120	PyTracebackObject *exception_tb = NULL;
	121	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		121	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	122	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	123	static struct Nuitka_FrameObject *cache_frame_0e3929eae9272b58ded6c92efadf96a1 = NULL;		122	static struct Nuitka_FrameObject *cache_frame_0e3929eae9272b58ded6c92efadf96a1 = NULL;
	124	PyObject *tmp_return_value = NULL;		123	PyObject *tmp_return_value = NULL;
	125	PyObject *exception_keeper_type_1;		124	PyObject *exception_keeper_type_1;
	126	PyObject *exception_keeper_value_1;		125	PyObject *exception_keeper_value_1;
	127	PyTracebackObject *exception_keeper_tb_1;		126	PyTracebackObject *exception_keeper_tb_1;
	206	exception_lineno = 16;		205	exception_lineno = 16;
	207	goto frame_exception_exit_1;		206	goto frame_exception_exit_1;
	208	}		207	}
	209	assert(var_x == NULL);		208	assert(var_x == NULL);
	210	var_x = tmp_assign_source_3;		209	var_x = tmp_assign_source_3;
n	211	}	n
	212	{
	213	PyObject *tmp_value_value_2;
	214	PyObject *tmp_next_value_1;
	215	CHECK_OBJECT(var_gen);
	216	tmp_value_value_2 = var_gen;
	217	tmp_next_value_1 = ITERATOR_NEXT(tmp_value_value_2);
	218	if (tmp_next_value_1 == NULL) {
	219	if (!HAS_ERROR_OCCURRED(tstate)) {
	220	exception_type = PyExc_StopIteration;
	221	Py_INCREF(exception_type);
	222	exception_value = NULL;
	223	exception_tb = NULL;
	224	} else {
	225	FETCH_ERROR_OCCURRED(tstate, &exception_type, &exception_value, &exception_tb);
	226	}
	227
	228
	229	type_description_1 = "ooo";
	230	exception_lineno = 18;
	231	goto frame_exception_exit_1;
	232	}
	233	Py_DECREF(tmp_next_value_1);
	234	}		210	}
	235			211
	236			212
	237	// Put the previous frame back on top.		213	// Put the previous frame back on top.
	238	popFrameStack(tstate);		214	popFrameStack(tstate);
	307	CHECK_OBJECT(var_generator);		283	CHECK_OBJECT(var_generator);
	308	Py_DECREF(var_generator);		284	Py_DECREF(var_generator);
	309	var_generator = NULL;		285	var_generator = NULL;
	310	Py_XDECREF(var_gen);		286	Py_XDECREF(var_gen);
	311	var_gen = NULL;		287	var_gen = NULL;
t	312	Py_XDECREF(var_x);	t
	313	var_x = NULL;
	314	// Re-raise.		288	// Re-raise.
	315	exception_type = exception_keeper_type_1;		289	exception_type = exception_keeper_type_1;
	316	exception_value = exception_keeper_value_1;		290	exception_value = exception_keeper_value_1;
	317	exception_tb = exception_keeper_tb_1;		291	exception_tb = exception_keeper_tb_1;
	318	exception_lineno = exception_keeper_lineno_1;		292	exception_lineno = exception_keeper_lineno_1;