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
	94	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		94	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	95	PyObject *exception_type = NULL;		95	PyObject *exception_type = NULL;
	96	PyObject *exception_value = NULL;		96	PyObject *exception_value = NULL;
	97	PyTracebackObject *exception_tb = NULL;		97	PyTracebackObject *exception_tb = NULL;
	98	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		98	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	99	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	100	static struct Nuitka_FrameObject *cache_frame_a1cce3b7d924dea17d0b3dcc85b0b94a = NULL;		99	static struct Nuitka_FrameObject *cache_frame_a1cce3b7d924dea17d0b3dcc85b0b94a = NULL;
	101	PyObject *tmp_return_value = NULL;		100	PyObject *tmp_return_value = NULL;
	102	PyObject *exception_keeper_type_1;		101	PyObject *exception_keeper_type_1;
	103	PyObject *exception_keeper_value_1;		102	PyObject *exception_keeper_value_1;
	104	PyTracebackObject *exception_keeper_tb_1;		103	PyTracebackObject *exception_keeper_tb_1;
	212	exception_lineno = 28;		211	exception_lineno = 28;
	213	goto frame_exception_exit_1;		212	goto frame_exception_exit_1;
	214	}		213	}
	215	assert(var_x == NULL);		214	assert(var_x == NULL);
	216	var_x = tmp_assign_source_3;		215	var_x = tmp_assign_source_3;
t	217	}	t
	218	{
	219	PyObject *tmp_all_arg_1;
	220	PyObject *tmp_capi_result_1;
	221	CHECK_OBJECT(var_gen);
	222	tmp_all_arg_1 = var_gen;
	223	tmp_capi_result_1 = BUILTIN_ALL(tmp_all_arg_1);
	224	if (tmp_capi_result_1 == NULL) {
	225	assert(ERROR_OCCURRED());
	226
	227	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	228
	229
	230	exception_lineno = 32;
	231	type_description_1 = "ooo";
	232	goto frame_exception_exit_1;
	233	}
	234	Py_DECREF(tmp_capi_result_1);
	235	}		216	}
	236	{		217	{
	237	PyObject *tmp_assign_source_4;		218	PyObject *tmp_assign_source_4;
	238	PyObject *tmp_value_name_2;		219	PyObject *tmp_value_name_2;
	239	CHECK_OBJECT(var_gen);		220	CHECK_OBJECT(var_gen);