Construct ListCreationConstant

Kay Hayen

2023-03-24 10:36

Performance Diagrams

Source Code with Constructimport itertools

def calledRepeatedly():
    # construct_begin
    l = [50, 51, 52, 53, 54, 55, 56, 57]
    # construct_alternative

    return l

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

print("OK.")

Source Code without Constructimport itertools

def calledRepeatedly():
    # construct_begin

    # construct_alternative
    l = 1
    # construct_end

    return l

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

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	20	import itertools		20	import itertools
	21			21
	22			22
	23	def calledRepeatedly():		23	def calledRepeatedly():
	24	# construct_begin		24	# construct_begin
n	25	l = [50, 51, 52, 53, 54, 55, 56, 57]	n	25
	26	# construct_alternative		26	# construct_alternative
t	27		t	27	l = 1
	28			28	# construct_end
	29			29
	30	return l		30	return l
	31			31
	32			32
	33	for x in itertools.repeat(None, 50000):		33	for x in itertools.repeat(None, 50000):

Context Diff of Generated Code

	Construct			Baseline
	82	static PyCodeObject *codeobj_5264e12d5b47d0aa137c70a8598f82da;		82	static PyCodeObject *codeobj_5264e12d5b47d0aa137c70a8598f82da;
	83	/* For use in "MainProgram.c". */		83	/* For use in "MainProgram.c". */
	84	PyCodeObject *codeobj_main = NULL;		84	PyCodeObject *codeobj_main = NULL;
	85			85
	86	static void createModuleCodeObjects(void) {		86	static void createModuleCodeObjects(void) {
n	87	module_filename_obj = mod_consts[2]; CHECK_OBJECT(module_filename_obj);	n	87	module_filename_obj = mod_consts[1]; CHECK_OBJECT(module_filename_obj);
	88	codeobj_d7258b2c2abf224cd586e250dee4bf62 = MAKE_CODE_OBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[10], mod_consts[10], NULL, NULL, 0, 0, 0);		88	codeobj_d7258b2c2abf224cd586e250dee4bf62 = MAKE_CODE_OBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[10], mod_consts[10], NULL, NULL, 0, 0, 0);
	89	codeobj_main = codeobj_d7258b2c2abf224cd586e250dee4bf62;		89	codeobj_main = codeobj_d7258b2c2abf224cd586e250dee4bf62;
	90	codeobj_5264e12d5b47d0aa137c70a8598f82da = MAKE_CODE_OBJECT(module_filename_obj, 23, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[5], mod_consts[5], mod_consts[11], NULL, 0, 0, 0);		90	codeobj_5264e12d5b47d0aa137c70a8598f82da = MAKE_CODE_OBJECT(module_filename_obj, 23, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[5], mod_consts[5], mod_consts[11], NULL, 0, 0, 0);
	91	}		91	}
	92			92
	93	// The module function declarations.		93	// The module function declarations.
	94	static PyObject *MAKE_FUNCTION___main__$$$function__1_calledRepeatedly();		94	static PyObject *MAKE_FUNCTION___main__$$$function__1_calledRepeatedly();
	95			95
	96			96
	97	// The module function definitions.		97	// The module function definitions.
n	98	static PyObject impl___main__$$$function__1_calledRepeatedly(struct Nuitka_FunctionObject const self, PyObject **python_pars) {	n
	99	// Preserve error status for checks
	100	#ifndef __NUITKA_NO_ASSERT__
	101	NUITKA_MAY_BE_UNUSED bool had_error = ERROR_OCCURRED();
	102	#endif
	103
	104	// Local variable declarations.
	105	PyObject *var_l = NULL;
	106	PyObject *tmp_return_value = NULL;
	107
	108	// Actual function body.
	109	{
	110	PyObject *tmp_assign_source_1;
	111	tmp_assign_source_1 = MAKE_LIST8(mod_consts[0]);
	112	assert(var_l == NULL);
	113	var_l = tmp_assign_source_1;
	114	}
	115	// Tried code:
	116	CHECK_OBJECT(var_l);
	117	tmp_return_value = var_l;
	118	Py_INCREF(tmp_return_value);
	119	goto try_return_handler_1;
	120	NUITKA_CANNOT_GET_HERE("tried codes exits in all cases");
	121	return NULL;
	122	// Return handler code:
	123	try_return_handler_1:;
	124	CHECK_OBJECT(var_l);
	125	Py_DECREF(var_l);
	126	var_l = NULL;
	127	goto function_return_exit;
	128	// End of try:
	129
	130	NUITKA_CANNOT_GET_HERE("Return statement must have exited already.");
	131	return NULL;
	132
	133
	134	function_return_exit:
	135	// Function cleanup code if any.
	136
	137
	138	// Actual function exit with return value, making sure we did not make
	139	// the error status worse despite non-NULL return.
	140	CHECK_OBJECT(tmp_return_value);
	141	assert(had_error \|\| !ERROR_OCCURRED());
	142	return tmp_return_value;
	143	}
	144
	145
	146			98
	147	static PyObject *MAKE_FUNCTION___main__$$$function__1_calledRepeatedly() {		99	static PyObject *MAKE_FUNCTION___main__$$$function__1_calledRepeatedly() {
	148	struct Nuitka_FunctionObject *result = Nuitka_Function_New(		100	struct Nuitka_FunctionObject *result = Nuitka_Function_New(
n	149	impl___main__$$$function__1_calledRepeatedly,	n	101	NULL,
	150	mod_consts[5],		102	mod_consts[5],
	151	#if PYTHON_VERSION >= 0x300		103	#if PYTHON_VERSION >= 0x300
	152	NULL,		104	NULL,
	153	#endif		105	#endif
	154	codeobj_5264e12d5b47d0aa137c70a8598f82da,		106	codeobj_5264e12d5b47d0aa137c70a8598f82da,
	160	module___main__,		112	module___main__,
	161	NULL,		113	NULL,
	162	NULL,		114	NULL,
	163	0		115	0
	164	);		116	);
n	165		n	117	Nuitka_Function_EnableConstReturnGeneric(result, mod_consts[4]);
	166			118
	167	return (PyObject *)result;		119	return (PyObject *)result;
	168	}		120	}
	169			121
	170			122
	180	// Provide a way to create find a function via its C code and create it back		132	// Provide a way to create find a function via its C code and create it back
	181	// in another process, useful for multiprocessing extensions like dill		133	// in another process, useful for multiprocessing extensions like dill
	182	extern void registerDillPluginTables(char const module_name, PyMethodDef reduce_compiled_function, PyMethodDef *create_compiled_function);		134	extern void registerDillPluginTables(char const module_name, PyMethodDef reduce_compiled_function, PyMethodDef *create_compiled_function);
	183			135
	184	function_impl_code functable___main__[] = {		136	function_impl_code functable___main__[] = {
n	185	impl___main__$$$function__1_calledRepeatedly,	n	137	NULL,
	186	NULL		138	NULL
	187	};		139	};
	188			140
	189	static char const *_reduce_compiled_function_argnames[] = {		141	static char const *_reduce_compiled_function_argnames[] = {
	190	"func",		142	"func",
	529			481
	530	// Module code.		482	// Module code.
	531	{		483	{
	532	PyObject *tmp_assign_source_1;		484	PyObject *tmp_assign_source_1;
	533	tmp_assign_source_1 = Py_None;		485	tmp_assign_source_1 = Py_None;
n	534	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[1], tmp_assign_source_1);	n	486	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[0], tmp_assign_source_1);
	535	}		487	}
	536	{		488	{
	537	PyObject *tmp_assign_source_2;		489	PyObject *tmp_assign_source_2;
n	538	tmp_assign_source_2 = mod_consts[2];	n	490	tmp_assign_source_2 = mod_consts[1];
	539	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[3], tmp_assign_source_2);		491	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[2], tmp_assign_source_2);
	540	}		492	}
	541	{		493	{
	542	PyObject *tmp_assign_source_3;		494	PyObject *tmp_assign_source_3;
	543	PyObject *tmp_name_value_1;		495	PyObject *tmp_name_value_1;
	544	PyObject *tmp_globals_arg_value_1;		496	PyObject *tmp_globals_arg_value_1;
	545	PyObject *tmp_locals_arg_value_1;		497	PyObject *tmp_locals_arg_value_1;
	546	PyObject *tmp_fromlist_value_1;		498	PyObject *tmp_fromlist_value_1;
n	547	tmp_name_value_1 = mod_consts[4];	n	499	tmp_name_value_1 = mod_consts[3];
	548	tmp_globals_arg_value_1 = (PyObject *)moduledict___main__;		500	tmp_globals_arg_value_1 = (PyObject *)moduledict___main__;
	549	tmp_locals_arg_value_1 = Py_None;		501	tmp_locals_arg_value_1 = Py_None;
	550	tmp_fromlist_value_1 = Py_None;		502	tmp_fromlist_value_1 = Py_None;
	551	tmp_assign_source_3 = IMPORT_MODULE4(tmp_name_value_1, tmp_globals_arg_value_1, tmp_locals_arg_value_1, tmp_fromlist_value_1);		503	tmp_assign_source_3 = IMPORT_MODULE4(tmp_name_value_1, tmp_globals_arg_value_1, tmp_locals_arg_value_1, tmp_fromlist_value_1);
	552	assert(!(tmp_assign_source_3 == NULL));		504	assert(!(tmp_assign_source_3 == NULL));
n	553	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_3);	n	505	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[3], tmp_assign_source_3);
	554	}		506	}
	555	{		507	{
	556	PyObject *tmp_assign_source_4;		508	PyObject *tmp_assign_source_4;
	557			509
	558			510
	570	// Framed code:		522	// Framed code:
	571	{		523	{
	572	PyObject *tmp_assign_source_5;		524	PyObject *tmp_assign_source_5;
	573	PyObject *tmp_iter_arg_1;		525	PyObject *tmp_iter_arg_1;
	574	PyObject *tmp_called_instance_1;		526	PyObject *tmp_called_instance_1;
n	575	tmp_called_instance_1 = GET_STRING_DICT_VALUE(moduledict___main__, (Nuitka_StringObject *)mod_consts[4]);	n	527	tmp_called_instance_1 = GET_STRING_DICT_VALUE(moduledict___main__, (Nuitka_StringObject *)mod_consts[3]);
	576			528
	577	if (unlikely(tmp_called_instance_1 == NULL)) {		529	if (unlikely(tmp_called_instance_1 == NULL)) {
t	578	tmp_called_instance_1 = GET_MODULE_VARIABLE_VALUE_FALLBACK(mod_consts[4]);	t	530	tmp_called_instance_1 = GET_MODULE_VARIABLE_VALUE_FALLBACK(mod_consts[3]);
	579	}		531	}
	580			532
	581	assert(!(tmp_called_instance_1 == NULL));		533	assert(!(tmp_called_instance_1 == NULL));
	582	frame_d7258b2c2abf224cd586e250dee4bf62->m_frame.f_lineno = 33;		534	frame_d7258b2c2abf224cd586e250dee4bf62->m_frame.f_lineno = 33;
	583	tmp_iter_arg_1 = CALL_METHOD_WITH_ARGS2(		535	tmp_iter_arg_1 = CALL_METHOD_WITH_ARGS2(