Construct GeneratorExpressionUsage

Performance Diagrams

Source Code with Construct

not_all = [1,1,1,1,1,1,1,1,0,1]

def calledRepeatedly():
    # We measure making a generator iterator step or not.
    gen = (x for x in not_all)

    # make sure it is started.
    x = next(gen)

    # This should abort.
# construct_begin
    all(gen)
# construct_end

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

    return x, y

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

print("OK.")

Source Code without Construct

not_all = [1,1,1,1,1,1,1,1,0,1]

def calledRepeatedly():
    # We measure making a generator iterator step or not.
    gen = (x for x in not_all)

    # make sure it is started.
    x = next(gen)

    # This should abort.
# construct_begin



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

    return x, y

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

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	27	# make sure it is started.		27	# make sure it is started.
	28	x = next(gen)		28	x = next(gen)
	29			29
	30	# This should abort.		30	# This should abort.
	31	# construct_begin		31	# construct_begin
t	32	all(gen)	t	32
	33	# construct_end		33
	34			34
	35	# make sure it is still running.		35	# make sure it is still running.
	36	y = next(gen)		36	y = next(gen)
	37			37
	38	return x, y		38	return x, y

Context Diff of Generated Code

	Construct			Baseline
	102	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		102	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	103	PyObject *exception_type = NULL;		103	PyObject *exception_type = NULL;
	104	PyObject *exception_value = NULL;		104	PyObject *exception_value = NULL;
	105	PyTracebackObject *exception_tb = NULL;		105	PyTracebackObject *exception_tb = NULL;
	106	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		106	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	107	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	108	static struct Nuitka_FrameObject *cache_frame_c75c346df0c5bee705aad70dadc81767 = NULL;		107	static struct Nuitka_FrameObject *cache_frame_c75c346df0c5bee705aad70dadc81767 = NULL;
	109	PyObject *tmp_return_value = NULL;		108	PyObject *tmp_return_value = NULL;
	110	PyObject *exception_keeper_type_1;		109	PyObject *exception_keeper_type_1;
	111	PyObject *exception_keeper_value_1;		110	PyObject *exception_keeper_value_1;
	112	PyTracebackObject *exception_keeper_tb_1;		111	PyTracebackObject *exception_keeper_tb_1;
	225	exception_lineno = 28;		224	exception_lineno = 28;
	226	goto frame_exception_exit_1;		225	goto frame_exception_exit_1;
	227	}		226	}
	228	assert(var_x == NULL);		227	assert(var_x == NULL);
	229	var_x = tmp_assign_source_3;		228	var_x = tmp_assign_source_3;
t	230	}	t
	231	{
	232	PyObject *tmp_all_arg_1;
	233	PyObject *tmp_capi_result_1;
	234	CHECK_OBJECT(var_gen);
	235	tmp_all_arg_1 = var_gen;
	236	tmp_capi_result_1 = BUILTIN_ALL(tmp_all_arg_1);
	237	if (tmp_capi_result_1 == NULL) {
	238	assert(ERROR_OCCURRED());
	239
	240	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	241
	242
	243	exception_lineno = 32;
	244	type_description_1 = "ooo";
	245	goto frame_exception_exit_1;
	246	}
	247	Py_DECREF(tmp_capi_result_1);
	248	}		229	}
	249	{		230	{
	250	PyObject *tmp_assign_source_4;		231	PyObject *tmp_assign_source_4;
	251	PyObject *tmp_value_name_2;		232	PyObject *tmp_value_name_2;
	252	CHECK_OBJECT(var_gen);		233	CHECK_OBJECT(var_gen);