Construct BuiltinSumWithGenerator

Performance Diagrams

Source Code with Construct

empty = ()

def calledRepeatedly():
    # We measure making a generator iterator step or not.
    gen = (x for x in range(1000))

    # This should abort.
# construct_begin
    y = sum(gen)
# construct_alternative



    return y, gen

for x in xrange(500):
    calledRepeatedly()

print("OK.")

Source Code without Construct

empty = ()

def calledRepeatedly():
    # We measure making a generator iterator step or not.
    gen = (x for x in range(1000))

    # This should abort.
# construct_begin

# construct_alternative
    y = gen
# construct_end

    return y, gen

for x in xrange(500):
    calledRepeatedly()

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	24	# We measure making a generator iterator step or not.		24	# We measure making a generator iterator step or not.
	25	gen = (x for x in range(1000))		25	gen = (x for x in range(1000))
	26			26
	27	# This should abort.		27	# This should abort.
	28	# construct_begin		28	# construct_begin
n	29	y = sum(gen)	n	29
	30	# construct_alternative		30	# construct_alternative
t	31		t	31	y = gen
	32			32	# construct_end
	33			33
	34	return y, gen		34	return y, gen
	35			35
	36	for x in xrange(500):		36	for x in xrange(500):
	37	calledRepeatedly()		37	calledRepeatedly()

Context Diff of Generated Code

	Construct			Baseline
	139	#endif		139	#endif
	140			140
	141	// Local variable declarations.		141	// Local variable declarations.
	142	PyObject *var_gen = NULL;		142	PyObject *var_gen = NULL;
	143	PyObject *var_y = NULL;		143	PyObject *var_y = NULL;
n	144	PyObject exception_type = NULL, exception_value = NULL;	n
	145	PyTracebackObject *exception_tb = NULL;
	146	NUITKA_MAY_BE_UNUSED int exception_lineno = -1;
	147	PyObject *exception_keeper_type_1;
	148	PyObject *exception_keeper_value_1;
	149	PyTracebackObject *exception_keeper_tb_1;
	150	NUITKA_MAY_BE_UNUSED int exception_keeper_lineno_1;
	151	PyObject *tmp_assign_source_1;		144	PyObject *tmp_assign_source_1;
	152	PyObject *tmp_assign_source_2;		145	PyObject *tmp_assign_source_2;
	153	PyObject *tmp_dircall_arg1_1;		146	PyObject *tmp_dircall_arg1_1;
	154	PyObject *tmp_iter_arg_1;		147	PyObject *tmp_iter_arg_1;
	155	PyObject *tmp_return_value;		148	PyObject *tmp_return_value;
n	156	PyObject *tmp_sum_sequence_1;	n
	157	PyObject *tmp_tuple_element_1;		149	PyObject *tmp_tuple_element_1;
n	158	static struct Nuitka_FrameObject *cache_frame_function = NULL;	n
	159
	160	struct Nuitka_FrameObject *frame_function;
	161
	162	char const *type_description;
	163	tmp_return_value = NULL;		150	tmp_return_value = NULL;
	164			151
	165	// Actual function code.		152	// Actual function code.
	166	tmp_iter_arg_1 = const_xrange_0_1000;		153	tmp_iter_arg_1 = const_xrange_0_1000;
	167	tmp_dircall_arg1_1 = MAKE_ITERATOR( tmp_iter_arg_1 );		154	tmp_dircall_arg1_1 = MAKE_ITERATOR( tmp_iter_arg_1 );
	173	}		160	}
	174	assert( tmp_assign_source_1 != NULL );		161	assert( tmp_assign_source_1 != NULL );
	175	assert( var_gen == NULL );		162	assert( var_gen == NULL );
	176	var_gen = tmp_assign_source_1;		163	var_gen = tmp_assign_source_1;
	177			164
n			n	165	tmp_assign_source_2 = var_gen;
				166
				167	assert( var_y == NULL );
				168	Py_INCREF( tmp_assign_source_2 );
				169	var_y = tmp_assign_source_2;
				170
	178	// Tried code:		171	// Tried code:
n	179	MAKE_OR_REUSE_FRAME( cache_frame_function, codeobj_383c0af2739274bba6159a6fcb70e3f3, module___main__, sizeof(PyObject )+sizeof(PyObject ) );	n
	180	frame_function = cache_frame_function;
	181
	182	// Push the new frame as the currently active one.
	183	pushFrameStack( frame_function );
	184
	185	// Mark the frame object as in use, ref count 1 will be up for reuse.
	186	assert( Py_REFCNT( frame_function ) == 2 ); // Frame stack
	187
	188	// Framed code:
	189	tmp_sum_sequence_1 = var_gen;
	190
	191	tmp_assign_source_2 = BUILTIN_SUM1( tmp_sum_sequence_1 );
	192	if ( tmp_assign_source_2 == NULL )
	193	{
	194	assert( ERROR_OCCURRED() );
	195
	196	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	197
	198
	199	exception_lineno = 29;
	200	type_description = "oo";
	201	goto frame_exception_exit_1;
	202	}
	203	assert( var_y == NULL );
	204	var_y = tmp_assign_source_2;
	205
	206
	207	#if 0
	208	RESTORE_FRAME_EXCEPTION( frame_function );
	209	#endif
	210
	211	// Put the previous frame back on top.
	212	popFrameStack();
	213
	214	goto frame_no_exception_1;
	215
	216	frame_exception_exit_1:;
	217
	218	#if 0
	219	RESTORE_FRAME_EXCEPTION( frame_function );
	220	#endif
	221
	222	if ( exception_tb == NULL )
	223	{
	224	exception_tb = MAKE_TRACEBACK( frame_function, exception_lineno );
	225	}
	226	else if ( exception_tb->tb_frame != &frame_function->m_frame )
	227	{
	228	exception_tb = ADD_TRACEBACK( exception_tb, frame_function, exception_lineno );
	229	}
	230
	231	Nuitka_Frame_AttachLocals( (struct Nuitka_FrameObject *)frame_function, type_description ,var_gen, var_y );
	232
	233	// Release cached frame.
	234	if ( frame_function == cache_frame_function )
	235	{
	236	Py_DECREF( frame_function );
	237	}
	238	cache_frame_function = NULL;
	239
	240	assertFrameObject( frame_function );
	241
	242
	243	// Put the previous frame back on top.
	244	popFrameStack();
	245
	246	// Return the error.
	247	goto try_except_handler_1;
	248
	249	frame_no_exception_1:;
	250
	251	tmp_return_value = PyTuple_New( 2 );		172	tmp_return_value = PyTuple_New( 2 );
	252	tmp_tuple_element_1 = var_y;		173	tmp_tuple_element_1 = var_y;
	253			174
	254	Py_INCREF( tmp_tuple_element_1 );		175	Py_INCREF( tmp_tuple_element_1 );
	255	PyTuple_SET_ITEM( tmp_return_value, 0, tmp_tuple_element_1 );		176	PyTuple_SET_ITEM( tmp_return_value, 0, tmp_tuple_element_1 );
	269			190
	270	Py_XDECREF( var_y );		191	Py_XDECREF( var_y );
	271	var_y = NULL;		192	var_y = NULL;
	272			193
	273	goto function_return_exit;		194	goto function_return_exit;
n	274	// Exception handler code:	n
	275	try_except_handler_1:;
	276	exception_keeper_type_1 = exception_type;
	277	exception_keeper_value_1 = exception_value;
	278	exception_keeper_tb_1 = exception_tb;
	279	exception_keeper_lineno_1 = exception_lineno;
	280	exception_type = NULL;
	281	exception_value = NULL;
	282	exception_tb = NULL;
	283	exception_lineno = -1;
	284
	285	CHECK_OBJECT( (PyObject *)var_gen );
	286	Py_DECREF( var_gen );
	287	var_gen = NULL;
	288
	289	// Re-raise.
	290	exception_type = exception_keeper_type_1;
	291	exception_value = exception_keeper_value_1;
	292	exception_tb = exception_keeper_tb_1;
	293	exception_lineno = exception_keeper_lineno_1;
	294
	295	goto function_exception_exit;
	296	// End of try:		195	// End of try:
	297			196
	298	// Return statement must have exited already.		197	// Return statement must have exited already.
	299	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );		198	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );
	300	return NULL;		199	return NULL;
	301			200
t	302	function_exception_exit:	t
	303	assert( exception_type );
	304	RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
	305
	306	return NULL;
	307	function_return_exit:		201	function_return_exit:
	308			202
	309	CHECK_OBJECT( tmp_return_value );		203	CHECK_OBJECT( tmp_return_value );
	310	assert( had_error \|\| !ERROR_OCCURRED() );		204	assert( had_error \|\| !ERROR_OCCURRED() );
	311	return tmp_return_value;		205	return tmp_return_value;