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
	136			136
	137	// Local variable declarations.		137	// Local variable declarations.
	138	PyObject *var_gen = NULL;		138	PyObject *var_gen = NULL;
	139	PyObject *var_y = NULL;		139	PyObject *var_y = NULL;
	140	PyObject *tmp_genexpr_1__$0 = NULL;		140	PyObject *tmp_genexpr_1__$0 = NULL;
n	141	PyObject exception_type = NULL, exception_value = NULL;	n
	142	PyTracebackObject *exception_tb = NULL;
	143	NUITKA_MAY_BE_UNUSED int exception_lineno = -1;
	144	PyObject *exception_keeper_type_1;
	145	PyObject *exception_keeper_value_1;
	146	PyTracebackObject *exception_keeper_tb_1;
	147	NUITKA_MAY_BE_UNUSED int exception_keeper_lineno_1;
	148	PyObject *tmp_assign_source_1;		141	PyObject *tmp_assign_source_1;
	149	PyObject *tmp_assign_source_2;		142	PyObject *tmp_assign_source_2;
	150	PyObject *tmp_assign_source_3;		143	PyObject *tmp_assign_source_3;
	151	PyObject *tmp_iter_arg_1;		144	PyObject *tmp_iter_arg_1;
	152	PyObject *tmp_outline_return_value_1;		145	PyObject *tmp_outline_return_value_1;
	153	PyObject *tmp_return_value;		146	PyObject *tmp_return_value;
n	154	PyObject *tmp_sum_sequence_1;	n
	155	PyObject *tmp_tuple_element_1;		147	PyObject *tmp_tuple_element_1;
n	156	static struct Nuitka_FrameObject *cache_frame_8e4d3822ca0c32cb5af7be221e8200c8 = NULL;	n
	157
	158	struct Nuitka_FrameObject *frame_8e4d3822ca0c32cb5af7be221e8200c8;
	159
	160	char const *type_description;
	161	tmp_return_value = NULL;		148	tmp_return_value = NULL;
	162	tmp_outline_return_value_1 = NULL;		149	tmp_outline_return_value_1 = NULL;
	163			150
	164	// Actual function code.		151	// Actual function code.
	165	tmp_iter_arg_1 = const_xrange_0_1000;		152	tmp_iter_arg_1 = const_xrange_0_1000;
	206	outline_result_1:;		193	outline_result_1:;
	207	tmp_assign_source_1 = tmp_outline_return_value_1;		194	tmp_assign_source_1 = tmp_outline_return_value_1;
	208	assert( var_gen == NULL );		195	assert( var_gen == NULL );
	209	var_gen = tmp_assign_source_1;		196	var_gen = tmp_assign_source_1;
	210			197
n			n	198	tmp_assign_source_3 = var_gen;
				199
				200	CHECK_OBJECT( tmp_assign_source_3 );
				201	assert( var_y == NULL );
				202	Py_INCREF( tmp_assign_source_3 );
				203	var_y = tmp_assign_source_3;
				204
	211	// Tried code:		205	// Tried code:
n	212	MAKE_OR_REUSE_FRAME( cache_frame_8e4d3822ca0c32cb5af7be221e8200c8, codeobj_8e4d3822ca0c32cb5af7be221e8200c8, module___main__, sizeof(PyObject )+sizeof(PyObject ) );	n
	213	frame_8e4d3822ca0c32cb5af7be221e8200c8 = cache_frame_8e4d3822ca0c32cb5af7be221e8200c8;
	214
	215	// Push the new frame as the currently active one.
	216	pushFrameStack( frame_8e4d3822ca0c32cb5af7be221e8200c8 );
	217
	218	// Mark the frame object as in use, ref count 1 will be up for reuse.
	219	assert( Py_REFCNT( frame_8e4d3822ca0c32cb5af7be221e8200c8 ) == 2 ); // Frame stack
	220
	221	// Framed code:
	222	tmp_sum_sequence_1 = var_gen;
	223
	224	CHECK_OBJECT( tmp_sum_sequence_1 );
	225	tmp_assign_source_3 = BUILTIN_SUM1( tmp_sum_sequence_1 );
	226	if ( tmp_assign_source_3 == NULL )
	227	{
	228	assert( ERROR_OCCURRED() );
	229
	230	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	231
	232
	233	exception_lineno = 29;
	234	type_description = "oo";
	235	goto frame_exception_exit_1;
	236	}
	237	assert( var_y == NULL );
	238	var_y = tmp_assign_source_3;
	239
	240
	241	#if 0
	242	RESTORE_FRAME_EXCEPTION( frame_8e4d3822ca0c32cb5af7be221e8200c8 );
	243	#endif
	244
	245	// Put the previous frame back on top.
	246	popFrameStack();
	247
	248	goto frame_no_exception_1;
	249
	250	frame_exception_exit_1:;
	251
	252	#if 0
	253	RESTORE_FRAME_EXCEPTION( frame_8e4d3822ca0c32cb5af7be221e8200c8 );
	254	#endif
	255
	256	if ( exception_tb == NULL )
	257	{
	258	exception_tb = MAKE_TRACEBACK( frame_8e4d3822ca0c32cb5af7be221e8200c8, exception_lineno );
	259	}
	260	else if ( exception_tb->tb_frame != &frame_8e4d3822ca0c32cb5af7be221e8200c8->m_frame )
	261	{
	262	exception_tb = ADD_TRACEBACK( exception_tb, frame_8e4d3822ca0c32cb5af7be221e8200c8, exception_lineno );
	263	}
	264
	265	Nuitka_Frame_AttachLocals( (struct Nuitka_FrameObject *)frame_8e4d3822ca0c32cb5af7be221e8200c8, type_description ,var_gen, var_y );
	266
	267	// Release cached frame.
	268	if ( frame_8e4d3822ca0c32cb5af7be221e8200c8 == cache_frame_8e4d3822ca0c32cb5af7be221e8200c8 )
	269	{
	270	Py_DECREF( frame_8e4d3822ca0c32cb5af7be221e8200c8 );
	271	}
	272	cache_frame_8e4d3822ca0c32cb5af7be221e8200c8 = NULL;
	273
	274	assertFrameObject( frame_8e4d3822ca0c32cb5af7be221e8200c8 );
	275
	276
	277	// Put the previous frame back on top.
	278	popFrameStack();
	279
	280	// Return the error.
	281	goto try_except_handler_2;
	282
	283	frame_no_exception_1:;
	284
	285	tmp_return_value = PyTuple_New( 2 );		206	tmp_return_value = PyTuple_New( 2 );
	286	tmp_tuple_element_1 = var_y;		207	tmp_tuple_element_1 = var_y;
	287			208
	288	CHECK_OBJECT( tmp_tuple_element_1 );		209	CHECK_OBJECT( tmp_tuple_element_1 );
	289	Py_INCREF( tmp_tuple_element_1 );		210	Py_INCREF( tmp_tuple_element_1 );
	305			226
	306	Py_XDECREF( var_y );		227	Py_XDECREF( var_y );
	307	var_y = NULL;		228	var_y = NULL;
	308			229
	309	goto function_return_exit;		230	goto function_return_exit;
n	310	// Exception handler code:	n
	311	try_except_handler_2:;
	312	exception_keeper_type_1 = exception_type;
	313	exception_keeper_value_1 = exception_value;
	314	exception_keeper_tb_1 = exception_tb;
	315	exception_keeper_lineno_1 = exception_lineno;
	316	exception_type = NULL;
	317	exception_value = NULL;
	318	exception_tb = NULL;
	319	exception_lineno = -1;
	320
	321	CHECK_OBJECT( (PyObject *)var_gen );
	322	Py_DECREF( var_gen );
	323	var_gen = NULL;
	324
	325	// Re-raise.
	326	exception_type = exception_keeper_type_1;
	327	exception_value = exception_keeper_value_1;
	328	exception_tb = exception_keeper_tb_1;
	329	exception_lineno = exception_keeper_lineno_1;
	330
	331	goto function_exception_exit;
	332	// End of try:		231	// End of try:
	333			232
	334	// Return statement must have exited already.		233	// Return statement must have exited already.
	335	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );		234	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );
	336	return NULL;		235	return NULL;
	337			236
t	338	function_exception_exit:	t
	339	assert( exception_type );
	340	RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
	341
	342	return NULL;
	343	function_return_exit:		237	function_return_exit:
	344			238
	345	CHECK_OBJECT( tmp_return_value );		239	CHECK_OBJECT( tmp_return_value );
	346	assert( had_error \|\| !ERROR_OCCURRED() );		240	assert( had_error \|\| !ERROR_OCCURRED() );
	347	return tmp_return_value;		241	return tmp_return_value;