Construct GlobalVariableAccess

Kay Hayen

2013-08-15 08:15

Performance Diagrams

Source Code with Construct

module_value1 = 1000
module_value2 = 2000

def calledRepeatedly():
    module_value1
# construct_begin
    return module_value2
# construct_alternative



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

print("OK.")

Source Code without Construct

module_value1 = 1000
module_value2 = 2000

def calledRepeatedly():
    module_value1
# construct_begin

# construct_alternative
    return None
# construct_end

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

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	22	module_value2 = 2000		22	module_value2 = 2000
	23			23
	24	def calledRepeatedly():		24	def calledRepeatedly():
	25	module_value1		25	module_value1
	26	# construct_begin		26	# construct_begin
n	27	return module_value2	n	27
	28	# construct_alternative		28	# construct_alternative
t	29		t	29	return None
	30			30	# construct_end
	31			31
	32	import itertools		32	import itertools
	33	for x in itertools.repeat(None, 50000):		33	for x in itertools.repeat(None, 50000):
	34	calledRepeatedly()		34	calledRepeatedly()
	35			35

Context Diff of Generated Code

	Construct			Baseline
	82	static PyCodeObject *codeobj_ef22b9ee91940a796696ef5dbf7f16e7;		82	static PyCodeObject *codeobj_ef22b9ee91940a796696ef5dbf7f16e7;
	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[3]; CHECK_OBJECT(module_filename_obj);	n	87	module_filename_obj = mod_consts[2]; CHECK_OBJECT(module_filename_obj);
	88	codeobj_6b53ce31f8be494ba7f0151e077f1d03 = MAKE_CODEOBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[17], NULL, NULL, 0, 0, 0);		88	codeobj_6b53ce31f8be494ba7f0151e077f1d03 = MAKE_CODEOBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[17], NULL, NULL, 0, 0, 0);
	89	codeobj_ef22b9ee91940a796696ef5dbf7f16e7 = MAKE_CODEOBJECT(module_filename_obj, 24, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[9], NULL, NULL, 0, 0, 0);		89	codeobj_ef22b9ee91940a796696ef5dbf7f16e7 = MAKE_CODEOBJECT(module_filename_obj, 24, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[9], NULL, NULL, 0, 0, 0);
	90	}		90	}
	91			91
	92	// The module function declarations.		92	// The module function declarations.
	106	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;		106	NUITKA_MAY_BE_UNUSED nuitka_void tmp_unused;
	107	PyObject *exception_type = NULL;		107	PyObject *exception_type = NULL;
	108	PyObject *exception_value = NULL;		108	PyObject *exception_value = NULL;
	109	PyTracebackObject *exception_tb = NULL;		109	PyTracebackObject *exception_tb = NULL;
	110	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		110	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n			n	111	static struct Nuitka_FrameObject *cache_frame_ef22b9ee91940a796696ef5dbf7f16e7 = NULL;
	111	PyObject *tmp_return_value = NULL;		112	PyObject *tmp_return_value = NULL;
n	112	static struct Nuitka_FrameObject *cache_frame_ef22b9ee91940a796696ef5dbf7f16e7 = NULL;	n
	113			113
	114	// Actual function body.		114	// Actual function body.
	115	if (isFrameUnusable(cache_frame_ef22b9ee91940a796696ef5dbf7f16e7)) {		115	if (isFrameUnusable(cache_frame_ef22b9ee91940a796696ef5dbf7f16e7)) {
	116	Py_XDECREF(cache_frame_ef22b9ee91940a796696ef5dbf7f16e7);		116	Py_XDECREF(cache_frame_ef22b9ee91940a796696ef5dbf7f16e7);
	117			117
	156	exception_lineno = 25;		156	exception_lineno = 25;
	157			157
	158	goto frame_exception_exit_1;		158	goto frame_exception_exit_1;
	159	}		159	}
	160	}		160	}
n	161	tmp_return_value = GET_STRING_DICT_VALUE(moduledict___main__, (Nuitka_StringObject *)mod_consts[1]);	n
	162
	163	if (unlikely(tmp_return_value == NULL)) {
	164	tmp_return_value = GET_MODULE_VARIABLE_VALUE_FALLBACK(mod_consts[1]);
	165	}
	166
	167	if (tmp_return_value == NULL) {
	168	assert(ERROR_OCCURRED());
	169
	170	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	171
	172
	173	exception_lineno = 27;
	174
	175	goto frame_exception_exit_1;
	176	}
	177	Py_INCREF(tmp_return_value);
	178	goto frame_return_exit_1;
	179			161
	180	#if 0		162	#if 0
	181	RESTORE_FRAME_EXCEPTION(frame_ef22b9ee91940a796696ef5dbf7f16e7);		163	RESTORE_FRAME_EXCEPTION(frame_ef22b9ee91940a796696ef5dbf7f16e7);
	182	#endif		164	#endif
	183			165
	184	// Put the previous frame back on top.		166	// Put the previous frame back on top.
	185	popFrameStack();		167	popFrameStack();
	186			168
	187	goto frame_no_exception_1;		169	goto frame_no_exception_1;
n	188		n
	189	frame_return_exit_1:;
	190	#if 0
	191	RESTORE_FRAME_EXCEPTION(frame_ef22b9ee91940a796696ef5dbf7f16e7);
	192	#endif
	193
	194	// Put the previous frame back on top.
	195	popFrameStack();
	196
	197	goto function_return_exit;
	198			170
	199	frame_exception_exit_1:;		171	frame_exception_exit_1:;
	200			172
	201	#if 0		173	#if 0
	202	RESTORE_FRAME_EXCEPTION(frame_ef22b9ee91940a796696ef5dbf7f16e7);		174	RESTORE_FRAME_EXCEPTION(frame_ef22b9ee91940a796696ef5dbf7f16e7);
	233			205
	234	// Return the error.		206	// Return the error.
	235	goto function_exception_exit;		207	goto function_exception_exit;
	236			208
	237	frame_no_exception_1:;		209	frame_no_exception_1:;
n			n	210	tmp_return_value = Py_None;
				211	Py_INCREF(tmp_return_value);
				212	goto function_return_exit;
	238			213
	239	NUITKA_CANNOT_GET_HERE("Return statement must have exited already.");		214	NUITKA_CANNOT_GET_HERE("Return statement must have exited already.");
	240	return NULL;		215	return NULL;
	241			216
	242	function_exception_exit:		217	function_exception_exit:
	644			619
	645	// Module code.		620	// Module code.
	646	{		621	{
	647	PyObject *tmp_assign_source_1;		622	PyObject *tmp_assign_source_1;
	648	tmp_assign_source_1 = Py_None;		623	tmp_assign_source_1 = Py_None;
n	649	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[2], tmp_assign_source_1);	n	624	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[1], tmp_assign_source_1);
	650	}		625	}
	651	{		626	{
	652	PyObject *tmp_assign_source_2;		627	PyObject *tmp_assign_source_2;
n	653	tmp_assign_source_2 = mod_consts[3];	n	628	tmp_assign_source_2 = mod_consts[2];
	654	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_2);		629	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[3], tmp_assign_source_2);
	655	}		630	}
	656	{		631	{
	657	PyObject *tmp_assign_source_3;		632	PyObject *tmp_assign_source_3;
	658	tmp_assign_source_3 = Py_None;		633	tmp_assign_source_3 = Py_None;
n	659	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[5], tmp_assign_source_3);	n	634	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_3);
	660	}		635	}
	661	{		636	{
	662	PyObject *tmp_assign_source_4;		637	PyObject *tmp_assign_source_4;
	663	tmp_assign_source_4 = PyDict_New();		638	tmp_assign_source_4 = PyDict_New();
n	664	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[6], tmp_assign_source_4);	n	639	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[5], tmp_assign_source_4);
	665	}		640	}
	666	{		641	{
	667	PyObject *tmp_assign_source_5;		642	PyObject *tmp_assign_source_5;
n	668	tmp_assign_source_5 = mod_consts[7];	n	643	tmp_assign_source_5 = mod_consts[6];
	669	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[0], tmp_assign_source_5);		644	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[0], tmp_assign_source_5);
	670	}		645	}
	671	{		646	{
	672	PyObject *tmp_assign_source_6;		647	PyObject *tmp_assign_source_6;
t	673	tmp_assign_source_6 = mod_consts[8];	t	648	tmp_assign_source_6 = mod_consts[7];
	674	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[1], tmp_assign_source_6);		649	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[8], tmp_assign_source_6);
	675	}		650	}
	676	{		651	{
	677	PyObject *tmp_assign_source_7;		652	PyObject *tmp_assign_source_7;
	678			653
	679			654