Construct GeneratorExpressionUsage

Kay Hayen

2024-04-26 13:13

Performance Diagrams

Source Code with Construct    # make sure it is still running.
    y = next(gen)

    return x, y


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    # make sure it is still running.
    y = next(gen)

    return x, y


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	# make sure it is started.		13	# make sure it is started.
	14	x = next(gen)		14	x = next(gen)
	15			15
	16	# This should abort.		16	# This should abort.
	17	# construct_begin		17	# construct_begin
t	18	all(gen)	t	18
	19	# construct_end		19
	20			20
	21	# make sure it is still running.		21	# make sure it is still running.
	22	y = next(gen)		22	y = next(gen)
	23			23
	24	return x, y		24	return x, y

Context Diff of Generated Code

	Construct			Baseline
	115	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		115	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	116	PyObject *exception_type = NULL;		116	PyObject *exception_type = NULL;
	117	PyObject *exception_value = NULL;		117	PyObject *exception_value = NULL;
	118	PyTracebackObject *exception_tb = NULL;		118	PyTracebackObject *exception_tb = NULL;
	119	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		119	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	120	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	121	static struct Nuitka_FrameObject *cache_frame_5ccc98682733f584392bf5df4d049c6a = NULL;		120	static struct Nuitka_FrameObject *cache_frame_5ccc98682733f584392bf5df4d049c6a = NULL;
	122	PyObject *tmp_return_value = NULL;		121	PyObject *tmp_return_value = NULL;
	123	PyObject *exception_keeper_type_1;		122	PyObject *exception_keeper_type_1;
	124	PyObject *exception_keeper_value_1;		123	PyObject *exception_keeper_value_1;
	125	PyTracebackObject *exception_keeper_tb_1;		124	PyTracebackObject *exception_keeper_tb_1;
	235	exception_lineno = 14;		234	exception_lineno = 14;
	236	goto frame_exception_exit_1;		235	goto frame_exception_exit_1;
	237	}		236	}
	238	assert(var_x == NULL);		237	assert(var_x == NULL);
	239	var_x = tmp_assign_source_3;		238	var_x = tmp_assign_source_3;
t	240	}	t
	241	{
	242	PyObject *tmp_all_arg_1;
	243	PyObject *tmp_capi_result_1;
	244	CHECK_OBJECT(var_gen);
	245	tmp_all_arg_1 = var_gen;
	246	tmp_capi_result_1 = BUILTIN_ALL(tstate, tmp_all_arg_1);
	247	if (tmp_capi_result_1 == NULL) {
	248	assert(HAS_ERROR_OCCURRED(tstate));
	249
	250	FETCH_ERROR_OCCURRED(tstate, &exception_type, &exception_value, &exception_tb);
	251
	252
	253	exception_lineno = 18;
	254	type_description_1 = "ooo";
	255	goto frame_exception_exit_1;
	256	}
	257	Py_DECREF(tmp_capi_result_1);
	258	}		239	}
	259	{		240	{
	260	PyObject *tmp_assign_source_4;		241	PyObject *tmp_assign_source_4;
	261	PyObject *tmp_value_value_2;		242	PyObject *tmp_value_value_2;
	262	CHECK_OBJECT(var_gen);		243	CHECK_OBJECT(var_gen);