Construct GeneratorExpressionUsage

Performance Diagrams

Source Code with Construct

not_all = [1,1,1,1,1,1,1,1,0,1]

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

    # make sure it is started.
    x = next(gen)

    # This should abort.
# construct_begin
    all(gen)
# construct_end

    # make sure it is still running.
    y = next(gen)

    return x, y

import itertools
for x in itertools.repeat(None, 50000):
    calledRepeatedly()

print("OK.")

Source Code without Construct

not_all = [1,1,1,1,1,1,1,1,0,1]

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

    # make sure it is started.
    x = next(gen)

    # This should abort.
# construct_begin



    # make sure it is still running.
    y = next(gen)

    return x, y

import itertools
for x in itertools.repeat(None, 50000):
    calledRepeatedly()

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	27	# make sure it is started.		27	# make sure it is started.
	28	x = next(gen)		28	x = next(gen)
	29			29
	30	# This should abort.		30	# This should abort.
	31	# construct_begin		31	# construct_begin
t	32	all(gen)	t	32
	33	# construct_end		33
	34			34
	35	# make sure it is still running.		35	# make sure it is still running.
	36	y = next(gen)		36	y = next(gen)
	37			37
	38	return x, y		38	return x, y

Context Diff of Generated Code

	Construct			Baseline
	45	extern PyObject *const_int_0;		45	extern PyObject *const_int_0;
	46	extern PyObject *const_str_plain_print;		46	extern PyObject *const_str_plain_print;
	47	static PyObject *const_int_pos_50000;		47	static PyObject *const_int_pos_50000;
	48	static PyObject *const_str_plain_gen;		48	static PyObject *const_str_plain_gen;
	49	static PyObject *const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple;		49	static PyObject *const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple;
n	50	static PyObject *const_str_plain_all;	n
	51	static PyObject *const_str_plain_calledRepeatedly;		50	static PyObject *const_str_plain_calledRepeatedly;
	52	static PyObject *const_str_plain_True;		51	static PyObject *const_str_plain_True;
	53	static PyObject *const_str_angle_module;		52	static PyObject *const_str_angle_module;
	54	static PyObject *const_str_plain_None;		53	static PyObject *const_str_plain_None;
	55	static PyObject *const_str_plain_x;		54	static PyObject *const_str_plain_x;
	90	const_int_pos_50000 = PyLong_FromUnsignedLong( 50000ul );		89	const_int_pos_50000 = PyLong_FromUnsignedLong( 50000ul );
	91	const_str_plain_gen = UNSTREAM_STRING( &constant_bin[ 27 ], 3, 1 );		90	const_str_plain_gen = UNSTREAM_STRING( &constant_bin[ 27 ], 3, 1 );
	92	const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple = PyTuple_New( 1 );		91	const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple = PyTuple_New( 1 );
	93	const_str_digest_5ed1392909ad16e6227b8230f4582352 = UNSTREAM_STRING( &constant_bin[ 140 ], 3, 0 );		92	const_str_digest_5ed1392909ad16e6227b8230f4582352 = UNSTREAM_STRING( &constant_bin[ 140 ], 3, 0 );
	94	PyTuple_SET_ITEM( const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple, 0, const_str_digest_5ed1392909ad16e6227b8230f4582352 ); Py_INCREF( const_str_digest_5ed1392909ad16e6227b8230f4582352 );		93	PyTuple_SET_ITEM( const_tuple_str_digest_5ed1392909ad16e6227b8230f4582352_tuple, 0, const_str_digest_5ed1392909ad16e6227b8230f4582352 ); Py_INCREF( const_str_digest_5ed1392909ad16e6227b8230f4582352 );
n	95	const_str_plain_all = UNSTREAM_STRING( &constant_bin[ 1 ], 3, 1 );	n
	96	const_str_plain_calledRepeatedly = UNSTREAM_STRING( &constant_bin[ 0 ], 16, 1 );		94	const_str_plain_calledRepeatedly = UNSTREAM_STRING( &constant_bin[ 0 ], 16, 1 );
	97	const_str_plain_True = UNSTREAM_STRING( &constant_bin[ 143 ], 4, 1 );		95	const_str_plain_True = UNSTREAM_STRING( &constant_bin[ 143 ], 4, 1 );
	98	const_str_angle_module = UNSTREAM_STRING( &constant_bin[ 147 ], 8, 0 );		96	const_str_angle_module = UNSTREAM_STRING( &constant_bin[ 147 ], 8, 0 );
	99	const_str_plain_None = UNSTREAM_STRING( &constant_bin[ 155 ], 4, 1 );		97	const_str_plain_None = UNSTREAM_STRING( &constant_bin[ 155 ], 4, 1 );
	100	const_str_plain_x = UNSTREAM_STRING( &constant_bin[ 31 ], 1, 1 );		98	const_str_plain_x = UNSTREAM_STRING( &constant_bin[ 31 ], 1, 1 );
	163	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;		161	NUITKA_MAY_BE_UNUSED char const *type_description_1 = NULL;
	164	PyObject *exception_type = NULL;		162	PyObject *exception_type = NULL;
	165	PyObject *exception_value = NULL;		163	PyObject *exception_value = NULL;
	166	PyTracebackObject *exception_tb = NULL;		164	PyTracebackObject *exception_tb = NULL;
	167	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;		165	NUITKA_MAY_BE_UNUSED int exception_lineno = 0;
n	168	NUITKA_MAY_BE_UNUSED PyObject *tmp_unused;	n
	169	static struct Nuitka_FrameObject *cache_frame_6c5696288ec414e7ce114f9eca2e90a3 = NULL;		166	static struct Nuitka_FrameObject *cache_frame_6c5696288ec414e7ce114f9eca2e90a3 = NULL;
	170	PyObject *tmp_return_value = NULL;		167	PyObject *tmp_return_value = NULL;
	171	PyObject *exception_keeper_type_1;		168	PyObject *exception_keeper_type_1;
	172	PyObject *exception_keeper_value_1;		169	PyObject *exception_keeper_value_1;
	173	PyTracebackObject *exception_keeper_tb_1;		170	PyTracebackObject *exception_keeper_tb_1;
	298	goto frame_exception_exit_1;		295	goto frame_exception_exit_1;
	299	}		296	}
	300	assert( var_x == NULL );		297	assert( var_x == NULL );
	301	var_x = tmp_assign_source_3;		298	var_x = tmp_assign_source_3;
	302			299
t	303	}	t
	304	{
	305	PyObject *tmp_called_name_1;
	306	PyObject *tmp_args_element_name_1;
	307	tmp_called_name_1 = LOOKUP_BUILTIN( const_str_plain_all );
	308	assert( tmp_called_name_1 != NULL );
	309	tmp_args_element_name_1 = var_gen;
	310
	311	if ( tmp_args_element_name_1 == NULL )
	312	{
	313
	314	exception_type = PyExc_UnboundLocalError;
	315	Py_INCREF( exception_type );
	316	exception_value = PyUnicode_FromFormat( "local variable '%s' referenced before assignment", "gen" );
	317	exception_tb = NULL;
	318	NORMALIZE_EXCEPTION( &exception_type, &exception_value, &exception_tb );
	319	CHAIN_EXCEPTION( exception_value );
	320
	321	exception_lineno = 32;
	322	type_description_1 = "ooo";
	323	goto frame_exception_exit_1;
	324	}
	325
	326	frame_6c5696288ec414e7ce114f9eca2e90a3->m_frame.f_lineno = 32;
	327	{
	328	PyObject *call_args[] = { tmp_args_element_name_1 };
	329	tmp_unused = CALL_FUNCTION_WITH_ARGS1( tmp_called_name_1, call_args );
	330	}
	331
	332	if ( tmp_unused == NULL )
	333	{
	334	assert( ERROR_OCCURRED() );
	335
	336	FETCH_ERROR_OCCURRED( &exception_type, &exception_value, &exception_tb );
	337
	338
	339	exception_lineno = 32;
	340	type_description_1 = "ooo";
	341	goto frame_exception_exit_1;
	342	}
	343	Py_DECREF( tmp_unused );
	344	}		300	}
	345	{		301	{
	346	PyObject *tmp_assign_source_4;		302	PyObject *tmp_assign_source_4;
	347	PyObject *tmp_value_name_2;		303	PyObject *tmp_value_name_2;
	348	tmp_value_name_2 = var_gen;		304	tmp_value_name_2 = var_gen;