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
	151	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		151	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	152	PyObject *exception_type = NULL;		152	PyObject *exception_type = NULL;
	153	PyObject *exception_value = NULL;		153	PyObject *exception_value = NULL;
	154	PyTracebackObject *exception_tb = NULL;		154	PyTracebackObject *exception_tb = NULL;
	155	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		155	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	156	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;	n
	157	static struct Nuitka_FrameObject *cache_frame_543bfbe67a37d0dfe20e9b95ff65aa32 = NULL;		156	static struct Nuitka_FrameObject *cache_frame_543bfbe67a37d0dfe20e9b95ff65aa32 = NULL;
	158	PyObject *tmp_return_value = NULL;		157	PyObject *tmp_return_value = NULL;
	159	PyObject *exception_keeper_type_1;		158	PyObject *exception_keeper_type_1;
	160	PyObject *exception_keeper_value_1;		159	PyObject *exception_keeper_value_1;
	161	PyTracebackObject *exception_keeper_tb_1;		160	PyTracebackObject *exception_keeper_tb_1;
	282	exception_lineno = 28;		281	exception_lineno = 28;
	283	goto frame_exception_exit_1;		282	goto frame_exception_exit_1;
	284	}		283	}
	285	assert(var_x == NULL);		284	assert(var_x == NULL);
	286	var_x = tmp_assign_source_3;		285	var_x = tmp_assign_source_3;
t	287	}	t
	288	{
	289	PyObject *tmp_all_arg_1;
	290	PyObject *tmp_capi_result_1;
	291	CHECK_OBJECT(var_gen);
	292	tmp_all_arg_1 = var_gen;
	293	tmp_capi_result_1 = BUILTIN_ALL(tmp_all_arg_1);
	294	if (tmp_capi_result_1 == NULL) {
	295	assert(ERROR_OCCURRED());
	296
	297	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	298
	299
	300	exception_lineno = 32;
	301	type_description_1 = "ooo";
	302	goto frame_exception_exit_1;
	303	}
	304	Py_DECREF(tmp_capi_result_1);
	305	}		286	}
	306	{		287	{
	307	PyObject *tmp_assign_source_4;		288	PyObject *tmp_assign_source_4;
	308	PyObject *tmp_value_name_2;		289	PyObject *tmp_value_name_2;
	309	CHECK_OBJECT(var_gen);		290	CHECK_OBJECT(var_gen);