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
	149			149
	150	// Local variable declarations.		150	// Local variable declarations.
	151	PyObject *var_gen = NULL;		151	PyObject *var_gen = NULL;
	152	PyObject *var_y = NULL;		152	PyObject *var_y = NULL;
	153	PyObject *tmp_genexpr_1__$0 = NULL;		153	PyObject *tmp_genexpr_1__$0 = NULL;
n	154	PyObject *exception_type = NULL;	n
	155	PyObject *exception_value = NULL;
	156	PyTracebackObject *exception_tb = NULL;
	157	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
	158	PyObject *exception_keeper_type_1;
	159	PyObject *exception_keeper_value_1;
	160	PyTracebackObject *exception_keeper_tb_1;
	161	NUITKA_MAY_BE_UNUSED int exception_keeper_lineno_1;
	162	PyObject *tmp_assign_source_1;		154	PyObject *tmp_assign_source_1;
	163	PyObject *tmp_assign_source_2;		155	PyObject *tmp_assign_source_2;
	164	PyObject *tmp_assign_source_3;		156	PyObject *tmp_assign_source_3;
	165	PyObject *tmp_iter_arg_1;		157	PyObject *tmp_iter_arg_1;
	166	PyObject *tmp_outline_return_value_1;		158	PyObject *tmp_outline_return_value_1;
	167	PyObject *tmp_return_value;		159	PyObject *tmp_return_value;
n	168	PyObject *tmp_sum_sequence_1;	n
	169	PyObject *tmp_tuple_element_1;		160	PyObject *tmp_tuple_element_1;
n	170	static struct Nuitka_FrameObject *cache_frame_5891894c5aa72da800aa86281c3f5a42 = NULL;	n
	171
	172	struct Nuitka_FrameObject *frame_5891894c5aa72da800aa86281c3f5a42;
	173
	174	char const *type_description;
	175	tmp_return_value = NULL;		161	tmp_return_value = NULL;
	176	tmp_outline_return_value_1 = NULL;		162	tmp_outline_return_value_1 = NULL;
	177			163
	178	// Actual function code.		164	// Actual function code.
	179	tmp_iter_arg_1 = const_xrange_0_1000;		165	tmp_iter_arg_1 = const_xrange_0_1000;
	220	outline_result_1:;		206	outline_result_1:;
	221	tmp_assign_source_1 = tmp_outline_return_value_1;		207	tmp_assign_source_1 = tmp_outline_return_value_1;
	222	assert( var_gen == NULL );		208	assert( var_gen == NULL );
	223	var_gen = tmp_assign_source_1;		209	var_gen = tmp_assign_source_1;
	224			210
n			n	211	tmp_assign_source_3 = var_gen;
				212
				213	CHECK_OBJECT( tmp_assign_source_3 );
				214	assert( var_y == NULL );
				215	Py_INCREF( tmp_assign_source_3 );
				216	var_y = tmp_assign_source_3;
				217
	225	// Tried code:		218	// Tried code:
n	226	MAKE_OR_REUSE_FRAME( cache_frame_5891894c5aa72da800aa86281c3f5a42, codeobj_5891894c5aa72da800aa86281c3f5a42, module___main__, sizeof(PyObject )+sizeof(PyObject ) );	n
	227	frame_5891894c5aa72da800aa86281c3f5a42 = cache_frame_5891894c5aa72da800aa86281c3f5a42;
	228
	229	// Push the new frame as the currently active one.
	230	pushFrameStack( frame_5891894c5aa72da800aa86281c3f5a42 );
	231
	232	// Mark the frame object as in use, ref count 1 will be up for reuse.
	233	assert( Py_REFCNT( frame_5891894c5aa72da800aa86281c3f5a42 ) == 2 ); // Frame stack
	234
	235	// Framed code:
	236	tmp_sum_sequence_1 = var_gen;
	237
	238	CHECK_OBJECT( tmp_sum_sequence_1 );
	239	tmp_assign_source_3 = BUILTIN_SUM1( tmp_sum_sequence_1 );
	240	if ( tmp_assign_source_3 == NULL )
	241	{
	242	assert( ERROR_OCCURRED() );
	243
	244	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	245
	246
	247	exception_lineno = 29;
	248	type_description = "oo";
	249	goto frame_exception_exit_1;
	250	}
	251	assert( var_y == NULL );
	252	var_y = tmp_assign_source_3;
	253
	254
	255	#if 0
	256	RESTORE_FRAME_EXCEPTION( frame_5891894c5aa72da800aa86281c3f5a42 );
	257	#endif
	258
	259	// Put the previous frame back on top.
	260	popFrameStack();
	261
	262	goto frame_no_exception_1;
	263
	264	frame_exception_exit_1:;
	265
	266	#if 0
	267	RESTORE_FRAME_EXCEPTION( frame_5891894c5aa72da800aa86281c3f5a42 );
	268	#endif
	269
	270	if ( exception_tb == NULL )
	271	{
	272	exception_tb = MAKE_TRACEBACK( frame_5891894c5aa72da800aa86281c3f5a42, exception_lineno );
	273	}
	274	else if ( exception_tb->tb_frame != &frame_5891894c5aa72da800aa86281c3f5a42->m_frame )
	275	{
	276	exception_tb = ADD_TRACEBACK( exception_tb, frame_5891894c5aa72da800aa86281c3f5a42, exception_lineno );
	277	}
	278
	279	Nuitka_Frame_AttachLocals( (struct Nuitka_FrameObject *)frame_5891894c5aa72da800aa86281c3f5a42, type_description ,var_gen, var_y );
	280
	281	// Release cached frame.
	282	if ( frame_5891894c5aa72da800aa86281c3f5a42 == cache_frame_5891894c5aa72da800aa86281c3f5a42 )
	283	{
	284	Py_DECREF( frame_5891894c5aa72da800aa86281c3f5a42 );
	285	}
	286	cache_frame_5891894c5aa72da800aa86281c3f5a42 = NULL;
	287
	288	assertFrameObject( frame_5891894c5aa72da800aa86281c3f5a42 );
	289
	290
	291	// Put the previous frame back on top.
	292	popFrameStack();
	293
	294	// Return the error.
	295	goto try_except_handler_2;
	296
	297	frame_no_exception_1:;
	298
	299	tmp_return_value = PyTuple_New( 2 );		219	tmp_return_value = PyTuple_New( 2 );
	300	tmp_tuple_element_1 = var_y;		220	tmp_tuple_element_1 = var_y;
	301			221
	302	CHECK_OBJECT( tmp_tuple_element_1 );		222	CHECK_OBJECT( tmp_tuple_element_1 );
	303	Py_INCREF( tmp_tuple_element_1 );		223	Py_INCREF( tmp_tuple_element_1 );
	319			239
	320	Py_XDECREF( var_y );		240	Py_XDECREF( var_y );
	321	var_y = NULL;		241	var_y = NULL;
	322			242
	323	goto function_return_exit;		243	goto function_return_exit;
n	324	// Exception handler code:	n
	325	try_except_handler_2:;
	326	exception_keeper_type_1 = exception_type;
	327	exception_keeper_value_1 = exception_value;
	328	exception_keeper_tb_1 = exception_tb;
	329	exception_keeper_lineno_1 = exception_lineno;
	330	exception_type = NULL;
	331	exception_value = NULL;
	332	exception_tb = NULL;
	333	exception_lineno = 0;
	334
	335	CHECK_OBJECT( (PyObject *)var_gen );
	336	Py_DECREF( var_gen );
	337	var_gen = NULL;
	338
	339	// Re-raise.
	340	exception_type = exception_keeper_type_1;
	341	exception_value = exception_keeper_value_1;
	342	exception_tb = exception_keeper_tb_1;
	343	exception_lineno = exception_keeper_lineno_1;
	344
	345	goto function_exception_exit;
	346	// End of try:		244	// End of try:
	347			245
	348	// Return statement must have exited already.		246	// Return statement must have exited already.
	349	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );		247	NUITKA_CANNOT_GET_HERE( __main__$$$function_1_calledRepeatedly );
	350	return NULL;		248	return NULL;
	351			249
t	352	function_exception_exit:	t
	353	assert( exception_type );
	354	RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
	355
	356	return NULL;
	357	function_return_exit:		250	function_return_exit:
	358			251
	359	CHECK_OBJECT( tmp_return_value );		252	CHECK_OBJECT( tmp_return_value );
	360	assert( had_error \|\| !ERROR_OCCURRED() );		253	assert( had_error \|\| !ERROR_OCCURRED() );
	361	return tmp_return_value;		254	return tmp_return_value;