Construct ClosureVariableAccess

Kay Hayen

2013-08-15 08:15

Performance Diagrams

Source Code with Construct

module_value1 = 1000
module_value2 = None
module_value3 = None

def calledRepeatedly():
    closure_value = module_value1

    def f():
        # Force frame and eliminate forward propagation (currently).
        module_value1

        # Use writing to global variable as access method.
        global module_value2, module_value3

# construct_begin
        module_value2 = closure_value
# construct_end

        module_value3 = closure_value

    f()

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

print("OK.")

Source Code without Construct

module_value1 = 1000
module_value2 = None
module_value3 = None

def calledRepeatedly():
    closure_value = module_value1

    def f():
        # Force frame and eliminate forward propagation (currently).
        module_value1

        # Use writing to global variable as access method.
        global module_value2, module_value3

# construct_begin



        module_value3 = closure_value

    f()

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

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	30			30
	31	# Use writing to global variable as access method.		31	# Use writing to global variable as access method.
	32	global module_value2, module_value3		32	global module_value2, module_value3
	33			33
	34	# construct_begin		34	# construct_begin
t	35	module_value2 = closure_value	t	35
	36	# construct_end		36
	37			37
	38	module_value3 = closure_value		38	module_value3 = closure_value
	39			39
	40	f()		40	f()
	41			41

Context Diff of Generated Code

	Construct			Baseline
	83	static PyCodeObject *codeobj_03611ab64f0b15f8d61d783fc934e777;		83	static PyCodeObject *codeobj_03611ab64f0b15f8d61d783fc934e777;
	84	/* For use in "MainProgram.c". */		84	/* For use in "MainProgram.c". */
	85	PyCodeObject *codeobj_main = NULL;		85	PyCodeObject *codeobj_main = NULL;
	86			86
	87	static void createModuleCodeObjects(void) {		87	static void createModuleCodeObjects(void) {
n	88	module_filename_obj = mod_consts[7]; CHECK_OBJECT(module_filename_obj);	n	88	module_filename_obj = mod_consts[6]; CHECK_OBJECT(module_filename_obj);
	89	codeobj_c36834269fa28c67f71509f5ea0e4e1b = MAKE_CODEOBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[20], NULL, NULL, 0, 0, 0);		89	codeobj_c36834269fa28c67f71509f5ea0e4e1b = MAKE_CODEOBJECT(module_filename_obj, 1, CO_NOFREE, mod_consts[20], NULL, NULL, 0, 0, 0);
	90	codeobj_2a9d42f254cfc34864fc607c907c094b = MAKE_CODEOBJECT(module_filename_obj, 24, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[12], mod_consts[21], NULL, 0, 0, 0);		90	codeobj_2a9d42f254cfc34864fc607c907c094b = MAKE_CODEOBJECT(module_filename_obj, 24, CO_OPTIMIZED \| CO_NEWLOCALS \| CO_NOFREE, mod_consts[12], mod_consts[21], NULL, 0, 0, 0);
	91	codeobj_03611ab64f0b15f8d61d783fc934e777 = MAKE_CODEOBJECT(module_filename_obj, 27, CO_OPTIMIZED \| CO_NEWLOCALS, mod_consts[1], mod_consts[22], mod_consts[22], 0, 0, 0);		91	codeobj_03611ab64f0b15f8d61d783fc934e777 = MAKE_CODEOBJECT(module_filename_obj, 27, CO_OPTIMIZED \| CO_NEWLOCALS, mod_consts[1], mod_consts[22], mod_consts[22], 0, 0, 0);
	92	}		92	}
	93			93
	387	FORMAT_UNBOUND_CLOSURE_ERROR(&exception_type, &exception_value, mod_consts[3]);		387	FORMAT_UNBOUND_CLOSURE_ERROR(&exception_type, &exception_value, mod_consts[3]);
	388	exception_tb = NULL;		388	exception_tb = NULL;
	389	NORMALIZE_EXCEPTION(&exception_type, &exception_value, &exception_tb);		389	NORMALIZE_EXCEPTION(&exception_type, &exception_value, &exception_tb);
	390	CHAIN_EXCEPTION(exception_value);		390	CHAIN_EXCEPTION(exception_value);
	391			391
n	392	exception_lineno = 35;	n
	393	type_description_1 = "c";
	394	goto frame_exception_exit_1;
	395	}
	396
	397	tmp_assign_source_1 = Nuitka_Cell_GET(self->m_closure[0]);
	398	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_1);
	399	}
	400	{
	401	PyObject *tmp_assign_source_2;
	402	if (Nuitka_Cell_GET(self->m_closure[0]) == NULL) {
	403
	404	FORMAT_UNBOUND_CLOSURE_ERROR(&exception_type, &exception_value, mod_consts[3]);
	405	exception_tb = NULL;
	406	NORMALIZE_EXCEPTION(&exception_type, &exception_value, &exception_tb);
	407	CHAIN_EXCEPTION(exception_value);
	408
	409	exception_lineno = 38;		392	exception_lineno = 38;
	410	type_description_1 = "c";		393	type_description_1 = "c";
	411	goto frame_exception_exit_1;		394	goto frame_exception_exit_1;
	412	}		395	}
	413			396
n	414	tmp_assign_source_2 = Nuitka_Cell_GET(self->m_closure[0]);	n	397	tmp_assign_source_1 = Nuitka_Cell_GET(self->m_closure[0]);
	415	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[5], tmp_assign_source_2);		398	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_1);
	416	}		399	}
	417			400
	418	#if 0		401	#if 0
	419	RESTORE_FRAME_EXCEPTION(frame_03611ab64f0b15f8d61d783fc934e777);		402	RESTORE_FRAME_EXCEPTION(frame_03611ab64f0b15f8d61d783fc934e777);
	420	#endif		403	#endif
	902			885
	903	// Module code.		886	// Module code.
	904	{		887	{
	905	PyObject *tmp_assign_source_1;		888	PyObject *tmp_assign_source_1;
	906	tmp_assign_source_1 = Py_None;		889	tmp_assign_source_1 = Py_None;
n	907	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[6], tmp_assign_source_1);	n	890	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[5], tmp_assign_source_1);
	908	}		891	}
	909	{		892	{
	910	PyObject *tmp_assign_source_2;		893	PyObject *tmp_assign_source_2;
n	911	tmp_assign_source_2 = mod_consts[7];	n	894	tmp_assign_source_2 = mod_consts[6];
	912	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[8], tmp_assign_source_2);		895	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[7], tmp_assign_source_2);
	913	}		896	}
	914	{		897	{
	915	PyObject *tmp_assign_source_3;		898	PyObject *tmp_assign_source_3;
	916	tmp_assign_source_3 = Py_None;		899	tmp_assign_source_3 = Py_None;
n	917	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[9], tmp_assign_source_3);	n	900	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[8], tmp_assign_source_3);
	918	}		901	}
	919	{		902	{
	920	PyObject *tmp_assign_source_4;		903	PyObject *tmp_assign_source_4;
	921	tmp_assign_source_4 = PyDict_New();		904	tmp_assign_source_4 = PyDict_New();
n	922	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[10], tmp_assign_source_4);	n	905	UPDATE_STRING_DICT1(moduledict___main__, (Nuitka_StringObject *)mod_consts[9], tmp_assign_source_4);
	923	}		906	}
	924	{		907	{
	925	PyObject *tmp_assign_source_5;		908	PyObject *tmp_assign_source_5;
n	926	tmp_assign_source_5 = mod_consts[11];	n	909	tmp_assign_source_5 = mod_consts[10];
	927	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[0], tmp_assign_source_5);		910	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[0], tmp_assign_source_5);
	928	}		911	}
	929	{		912	{
	930	PyObject *tmp_assign_source_6;		913	PyObject *tmp_assign_source_6;
	931	tmp_assign_source_6 = Py_None;		914	tmp_assign_source_6 = Py_None;
n	932	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_6);	n	915	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[11], tmp_assign_source_6);
	933	}		916	}
	934	{		917	{
	935	PyObject *tmp_assign_source_7;		918	PyObject *tmp_assign_source_7;
	936	tmp_assign_source_7 = Py_None;		919	tmp_assign_source_7 = Py_None;
t	937	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[5], tmp_assign_source_7);	t	920	UPDATE_STRING_DICT0(moduledict___main__, (Nuitka_StringObject *)mod_consts[4], tmp_assign_source_7);
	938	}		921	}
	939	{		922	{
	940	PyObject *tmp_assign_source_8;		923	PyObject *tmp_assign_source_8;
	941			924
	942			925