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

import itertools
for x in itertools.repeat(None, 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

import itertools
for x in itertools.repeat(None, 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	import itertools		36	import itertools
	37	for x in itertools.repeat(None, 500):		37	for x in itertools.repeat(None, 500):

Context Diff of Generated Code

	Construct			Baseline
	148			148
	149	// Local variable declarations.		149	// Local variable declarations.
	150	PyObject *var_y = NULL;		150	PyObject *var_y = NULL;
	151	PyObject *var_gen = NULL;		151	PyObject *var_gen = NULL;
	152	PyObject *tmp_genexpr_1__$0 = NULL;		152	PyObject *tmp_genexpr_1__$0 = NULL;
n	153	struct Nuitka_FrameObject *frame_8c136b9a557138cd9b36498e41e8c5c4;	n
	154	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	155	PyObject *exception_type = NULL;
	156	PyObject *exception_value = NULL;
	157	PyTracebackObject *exception_tb = NULL;
	158	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
	159	static struct Nuitka_FrameObject *cache_frame_8c136b9a557138cd9b36498e41e8c5c4 = NULL;
	160	PyObject *tmp_return_value = NULL;		153	PyObject *tmp_return_value = NULL;
n	161	PyObject *exception_keeper_type_1;	n
	162	PyObject *exception_keeper_value_1;
	163	PyTracebackObject *exception_keeper_tb_1;
	164	NUITKA_MAY_BE_UNUSED int exception_keeper_lineno_1;
	165			154
	166	// Actual function body.		155	// Actual function body.
	167	{		156	{
	168	PyObject *tmp_assign_source_1;		157	PyObject *tmp_assign_source_1;
	169	{		158	{
	202	return NULL;		191	return NULL;
	203	outline_result_1:;		192	outline_result_1:;
	204	assert( var_gen == NULL );		193	assert( var_gen == NULL );
	205	var_gen = tmp_assign_source_1;		194	var_gen = tmp_assign_source_1;
	206	}		195	}
n			n	196	{
				197	PyObject *tmp_assign_source_3;
				198	CHECK_OBJECT( var_gen );
				199	tmp_assign_source_3 = var_gen;
				200	assert( var_y == NULL );
				201	Py_INCREF( tmp_assign_source_3 );
				202	var_y = tmp_assign_source_3;
				203	}
	207	// Tried code:		204	// Tried code:
n	208	MAKE_OR_REUSE_FRAME( cache_frame_8c136b9a557138cd9b36498e41e8c5c4, codeobj_8c136b9a557138cd9b36498e41e8c5c4, module___main__, sizeof(void )+sizeof(void ) );	n
	209	frame_8c136b9a557138cd9b36498e41e8c5c4 = cache_frame_8c136b9a557138cd9b36498e41e8c5c4;
	210
	211	// Push the new frame as the currently active one.
	212	pushFrameStack( frame_8c136b9a557138cd9b36498e41e8c5c4 );
	213
	214	// Mark the frame object as in use, ref count 1 will be up for reuse.
	215	assert( Py_REFCNT( frame_8c136b9a557138cd9b36498e41e8c5c4 ) == 2 ); // Frame stack
	216
	217	// Framed code:
	218	{
	219	PyObject *tmp_assign_source_3;
	220	PyObject *tmp_sum_sequence_1;
	221	CHECK_OBJECT( var_gen );
	222	tmp_sum_sequence_1 = var_gen;
	223	tmp_assign_source_3 = BUILTIN_SUM1( tmp_sum_sequence_1 );
	224	if ( tmp_assign_source_3 == NULL )
	225	{
	226	assert( ERROR_OCCURRED() );
	227
	228	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	229
	230
	231	exception_lineno = 29;
	232	type_description_1 = "oo";
	233	goto frame_exception_exit_1;
	234	}
	235	assert( var_y == NULL );
	236	var_y = tmp_assign_source_3;
	237	}
	238
	239	#if 0
	240	RESTORE_FRAME_EXCEPTION( frame_8c136b9a557138cd9b36498e41e8c5c4 );
	241	#endif
	242
	243	// Put the previous frame back on top.
	244	popFrameStack();
	245
	246	goto frame_no_exception_1;
	247
	248	frame_exception_exit_1:;
	249
	250	#if 0
	251	RESTORE_FRAME_EXCEPTION( frame_8c136b9a557138cd9b36498e41e8c5c4 );
	252	#endif
	253
	254	if ( exception_tb == NULL )
	255	{
	256	exception_tb = MAKE_TRACEBACK( frame_8c136b9a557138cd9b36498e41e8c5c4, exception_lineno );
	257	}
	258	else if ( exception_tb->tb_frame != &frame_8c136b9a557138cd9b36498e41e8c5c4->m_frame )
	259	{
	260	exception_tb = ADD_TRACEBACK( exception_tb, frame_8c136b9a557138cd9b36498e41e8c5c4, exception_lineno );
	261	}
	262
	263	// Attachs locals to frame if any.
	264	Nuitka_Frame_AttachLocals(
	265	(struct Nuitka_FrameObject *)frame_8c136b9a557138cd9b36498e41e8c5c4,
	266	type_description_1,
	267	var_y,
	268	var_gen
	269	);
	270
	271
	272	// Release cached frame.
	273	if ( frame_8c136b9a557138cd9b36498e41e8c5c4 == cache_frame_8c136b9a557138cd9b36498e41e8c5c4 )
	274	{
	275	Py_DECREF( frame_8c136b9a557138cd9b36498e41e8c5c4 );
	276	}
	277	cache_frame_8c136b9a557138cd9b36498e41e8c5c4 = NULL;
	278
	279	assertFrameObject( frame_8c136b9a557138cd9b36498e41e8c5c4 );
	280
	281	// Put the previous frame back on top.
	282	popFrameStack();
	283
	284	// Return the error.
	285	goto try_except_handler_2;
	286
	287	frame_no_exception_1:;
	288	{		205	{
	289	PyObject *tmp_tuple_element_1;		206	PyObject *tmp_tuple_element_1;
	290	CHECK_OBJECT( var_y );		207	CHECK_OBJECT( var_y );
	291	tmp_tuple_element_1 = var_y;		208	tmp_tuple_element_1 = var_y;
	292	tmp_return_value = PyTuple_New( 2 );		209	tmp_return_value = PyTuple_New( 2 );
	310	CHECK_OBJECT( (PyObject *)var_gen );		227	CHECK_OBJECT( (PyObject *)var_gen );
	311	Py_DECREF( var_gen );		228	Py_DECREF( var_gen );
	312	var_gen = NULL;		229	var_gen = NULL;
	313			230
	314	goto function_return_exit;		231	goto function_return_exit;
n	315	// Exception handler code:	n
	316	try_except_handler_2:;
	317	exception_keeper_type_1 = exception_type;
	318	exception_keeper_value_1 = exception_value;
	319	exception_keeper_tb_1 = exception_tb;
	320	exception_keeper_lineno_1 = exception_lineno;
	321	exception_type = NULL;
	322	exception_value = NULL;
	323	exception_tb = NULL;
	324	exception_lineno = 0;
	325
	326	CHECK_OBJECT( (PyObject *)var_gen );
	327	Py_DECREF( var_gen );
	328	var_gen = NULL;
	329
	330	// Re-raise.
	331	exception_type = exception_keeper_type_1;
	332	exception_value = exception_keeper_value_1;
	333	exception_tb = exception_keeper_tb_1;
	334	exception_lineno = exception_keeper_lineno_1;
	335
	336	goto function_exception_exit;
	337	// End of try:		232	// End of try:
	338			233
	339	// Return statement must have exited already.		234	// Return statement must have exited already.
	340	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );		235	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );
	341	return NULL;		236	return NULL;
	342			237
t	343	function_exception_exit:	t
	344	assert( exception_type );
	345	RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
	346
	347	return NULL;
	348			238
	349	function_return_exit:		239	function_return_exit:
	350	// Function cleanup code if any.		240	// Function cleanup code if any.
	351			241
	352			242