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
	101	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		101	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	102	PyObject *exception_type = NULL;		102	PyObject *exception_type = NULL;
	103	PyObject *exception_value = NULL;		103	PyObject *exception_value = NULL;
	104	PyTracebackObject *exception_tb = NULL;		104	PyTracebackObject *exception_tb = NULL;
	105	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		105	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	106	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	107	static struct Nuitka_FrameObject *cache_frame_a701223e263d09bdd429370a8976884d = NULL;		106	static struct Nuitka_FrameObject *cache_frame_a701223e263d09bdd429370a8976884d = NULL;
	108	PyObject *tmp_return_value = NULL;		107	PyObject *tmp_return_value = NULL;
	109	PyObject *exception_keeper_type_1;		108	PyObject *exception_keeper_type_1;
	110	PyObject *exception_keeper_value_1;		109	PyObject *exception_keeper_value_1;
	111	PyTracebackObject *exception_keeper_tb_1;		110	PyTracebackObject *exception_keeper_tb_1;
	224	exception_lineno = 28;		223	exception_lineno = 28;
	225	goto frame_exception_exit_1;		224	goto frame_exception_exit_1;
	226	}		225	}
	227	assert(var_x == NULL);		226	assert(var_x == NULL);
	228	var_x = tmp_assign_source_3;		227	var_x = tmp_assign_source_3;
t	229	}	t
	230	{
	231	PyObject *tmp_all_arg_1;
	232	PyObject *tmp_capi_result_1;
	233	if (var_gen == NULL) {
	234
	235	FORMAT_UNBOUND_LOCAL_ERROR(&exception_type, &exception_value, mod_consts[1]);
	236	exception_tb = NULL;
	237	NORMALIZE_EXCEPTION(&exception_type, &exception_value, &exception_tb);
	238	CHAIN_EXCEPTION(exception_value);
	239
	240	exception_lineno = 32;
	241	type_description_1 = "ooo";
	242	goto frame_exception_exit_1;
	243	}
	244
	245	tmp_all_arg_1 = var_gen;
	246	tmp_capi_result_1 = BUILTIN_ALL(tmp_all_arg_1);
	247	if (tmp_capi_result_1 == NULL) {
	248	assert(ERROR_OCCURRED());
	249
	250	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	251
	252
	253	exception_lineno = 32;
	254	type_description_1 = "ooo";
	255	goto frame_exception_exit_1;
	256	}
	257	Py_DECREF(tmp_capi_result_1);
	258	}		228	}
	259	{		229	{
	260	PyObject *tmp_assign_source_4;		230	PyObject *tmp_assign_source_4;
	261	PyObject *tmp_value_name_2;		231	PyObject *tmp_value_name_2;
	262	if (var_gen == NULL) {		232	if (var_gen == NULL) {