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
	145			145
	146	// Local variable declarations.		146	// Local variable declarations.
	147	PyObject *var_y = NULL;		147	PyObject *var_y = NULL;
	148	PyObject *var_gen = NULL;		148	PyObject *var_gen = NULL;
	149	PyObject *tmp_genexpr_1__$0 = NULL;		149	PyObject *tmp_genexpr_1__$0 = NULL;
n	150	struct Nuitka_FrameObject *frame_f2a39da13f0b1cf9e3265e966fabae2f;	n
	151	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	152	PyObject *exception_type = NULL;
	153	PyObject *exception_value = NULL;
	154	PyTracebackObject *exception_tb = NULL;
	155	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
	156	static struct Nuitka_FrameObject *cache_frame_f2a39da13f0b1cf9e3265e966fabae2f = NULL;
	157	PyObject *tmp_return_value = NULL;		150	PyObject *tmp_return_value = NULL;
n	158	PyObject *exception_keeper_type_1;	n
	159	PyObject *exception_keeper_value_1;
	160	PyTracebackObject *exception_keeper_tb_1;
	161	NUITKA_MAY_BE_UNUSED int exception_keeper_lineno_1;
	162			151
	163	// Actual function code.		152	// Actual function code.
	164	{		153	{
	165	PyObject *tmp_assign_source_1;		154	PyObject *tmp_assign_source_1;
	166	PyObject *tmp_outline_return_value_1;		155	PyObject *tmp_outline_return_value_1;
	214	assert( var_gen == NULL );		203	assert( var_gen == NULL );
	215	var_gen = tmp_assign_source_1;		204	var_gen = tmp_assign_source_1;
	216			205
	217	}		206	}
	218	{		207	{
n			n	208	PyObject *tmp_assign_source_3;
				209	tmp_assign_source_3 = var_gen;
				210
				211	CHECK_OBJECT( tmp_assign_source_3 );
				212	assert( var_y == NULL );
				213	Py_INCREF( tmp_assign_source_3 );
				214	var_y = tmp_assign_source_3;
				215
				216	}
				217	{
	219	// Tried code:		218	// Tried code:
n	220	MAKE_OR_REUSE_FRAME( cache_frame_f2a39da13f0b1cf9e3265e966fabae2f, codeobj_f2a39da13f0b1cf9e3265e966fabae2f, module___main__, sizeof(void )+sizeof(void ) );	n
	221	frame_f2a39da13f0b1cf9e3265e966fabae2f = cache_frame_f2a39da13f0b1cf9e3265e966fabae2f;
	222
	223	// Push the new frame as the currently active one.
	224	pushFrameStack( frame_f2a39da13f0b1cf9e3265e966fabae2f );
	225
	226	// Mark the frame object as in use, ref count 1 will be up for reuse.
	227	assert( Py_REFCNT( frame_f2a39da13f0b1cf9e3265e966fabae2f ) == 2 ); // Frame stack
	228
	229	// Framed code:
	230	{
	231	PyObject *tmp_assign_source_3;
	232	PyObject *tmp_sum_sequence_1;
	233	tmp_sum_sequence_1 = var_gen;
	234
	235	CHECK_OBJECT( tmp_sum_sequence_1 );
	236	tmp_assign_source_3 = BUILTIN_SUM1( tmp_sum_sequence_1 );
	237	if ( tmp_assign_source_3 == NULL )
	238	{
	239	assert( ERROR_OCCURRED() );
	240
	241	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	242
	243
	244	exception_lineno = 29;
	245	type_description_1 = "oo";
	246	goto frame_exception_exit_1;
	247	}
	248	assert( var_y == NULL );
	249	var_y = tmp_assign_source_3;
	250
	251	}
	252
	253	#if 0
	254	RESTORE_FRAME_EXCEPTION( frame_f2a39da13f0b1cf9e3265e966fabae2f );
	255	#endif
	256
	257	// Put the previous frame back on top.
	258	popFrameStack();
	259
	260	goto frame_no_exception_1;
	261
	262	frame_exception_exit_1:;
	263
	264	#if 0
	265	RESTORE_FRAME_EXCEPTION( frame_f2a39da13f0b1cf9e3265e966fabae2f );
	266	#endif
	267
	268	if ( exception_tb == NULL )
	269	{
	270	exception_tb = MAKE_TRACEBACK( frame_f2a39da13f0b1cf9e3265e966fabae2f, exception_lineno );
	271	}
	272	else if ( exception_tb->tb_frame != &frame_f2a39da13f0b1cf9e3265e966fabae2f->m_frame )
	273	{
	274	exception_tb = ADD_TRACEBACK( exception_tb, frame_f2a39da13f0b1cf9e3265e966fabae2f, exception_lineno );
	275	}
	276
	277	// Attachs locals to frame if any.
	278	Nuitka_Frame_AttachLocals(
	279	(struct Nuitka_FrameObject *)frame_f2a39da13f0b1cf9e3265e966fabae2f,
	280	type_description_1,
	281	var_y,
	282	var_gen
	283	);
	284
	285
	286	// Release cached frame.
	287	if ( frame_f2a39da13f0b1cf9e3265e966fabae2f == cache_frame_f2a39da13f0b1cf9e3265e966fabae2f )
	288	{
	289	Py_DECREF( frame_f2a39da13f0b1cf9e3265e966fabae2f );
	290	}
	291	cache_frame_f2a39da13f0b1cf9e3265e966fabae2f = NULL;
	292
	293	assertFrameObject( frame_f2a39da13f0b1cf9e3265e966fabae2f );
	294
	295	// Put the previous frame back on top.
	296	popFrameStack();
	297
	298	// Return the error.
	299	goto try_except_handler_2;
	300
	301	frame_no_exception_1:;
	302
	303	{		219	{
	304	PyObject *tmp_tuple_element_1;		220	PyObject *tmp_tuple_element_1;
	305	tmp_tuple_element_1 = var_y;		221	tmp_tuple_element_1 = var_y;
	306			222
	307	CHECK_OBJECT( tmp_tuple_element_1 );		223	CHECK_OBJECT( tmp_tuple_element_1 );
	332			248
	333	}		249	}
	334	{		250	{
	335	goto function_return_exit;		251	goto function_return_exit;
	336	}		252	}
n	337	// Exception handler code:	n
	338	try_except_handler_2:;
	339	exception_keeper_type_1 = exception_type;
	340	exception_keeper_value_1 = exception_value;
	341	exception_keeper_tb_1 = exception_tb;
	342	exception_keeper_lineno_1 = exception_lineno;
	343	exception_type = NULL;
	344	exception_value = NULL;
	345	exception_tb = NULL;
	346	exception_lineno = 0;
	347
	348	{
	349	CHECK_OBJECT( (PyObject *)var_gen );
	350	Py_DECREF( var_gen );
	351	var_gen = NULL;
	352
	353	}
	354	{
	355	// Re-raise.
	356	exception_type = exception_keeper_type_1;
	357	exception_value = exception_keeper_value_1;
	358	exception_tb = exception_keeper_tb_1;
	359	exception_lineno = exception_keeper_lineno_1;
	360
	361	goto function_exception_exit;
	362	}
	363	// End of try:		253	// End of try:
	364	}		254	}
	365			255
	366	// Return statement must have exited already.		256	// Return statement must have exited already.
	367	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );		257	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );
	368	return NULL;		258	return NULL;
	369			259
t	370	function_exception_exit:	t
	371	assert( exception_type );
	372	RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
	373
	374	return NULL;
	375	function_return_exit:		260	function_return_exit:
	376			261
	377	CHECK_OBJECT( tmp_return_value );		262	CHECK_OBJECT( tmp_return_value );
	378	assert( had_error \|\| !ERROR_OCCURRED() );		263	assert( had_error \|\| !ERROR_OCCURRED() );
	379	return tmp_return_value;		264	return tmp_return_value;