Construct OperationAttributeLookup

Kay Hayen

2013-08-15 08:15

Performance Diagrams

Source Code with Construct

module_value1 = list()
module_value2 = 3000

def calledRepeatedly():
    # Force frame and eliminate forward propagation (currently).
    module_value1

    local_value = module_value1

    s = module_value1
    s.append
# construct_begin
    s.append
# construct_end
    s.append

    return s, local_value

import itertools
for x in itertools.repeat(None, 25000):
    calledRepeatedly()

print("OK.")

Source Code without Construct

module_value1 = list()
module_value2 = 3000

def calledRepeatedly():
    # Force frame and eliminate forward propagation (currently).
    module_value1

    local_value = module_value1

    s = module_value1
    s.append
# construct_begin


    s.append

    return s, local_value

import itertools
for x in itertools.repeat(None, 25000):
    calledRepeatedly()

print("OK.")

Context Diff of Source Code

	Construct			Baseline
	28	local_value = module_value1		28	local_value = module_value1
	29			29
	30	s = module_value1		30	s = module_value1
	31	s.append		31	s.append
	32	# construct_begin		32	# construct_begin
t	33	s.append	t	33
	34	# construct_end		34
	35	s.append		35	s.append
	36			36
	37	return s, local_value		37	return s, local_value
	38			38
	39	import itertools		39	import itertools

Context Diff of Generated Code

	Construct			Baseline
	237	assert(ERROR_OCCURRED());		237	assert(ERROR_OCCURRED());
	238			238
	239	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);		239	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	240			240
	241			241
n	242	exception_lineno = 33;	n
	243	type_description_1 = "oo";
	244	goto frame_exception_exit_1;
	245	}
	246	Py_DECREF(tmp_attribute_value_2);
	247	}
	248	{
	249	PyObject *tmp_expression_value_3;
	250	PyObject *tmp_attribute_value_3;
	251	CHECK_OBJECT(var_s);
	252	tmp_expression_value_3 = var_s;
	253	tmp_attribute_value_3 = LOOKUP_ATTRIBUTE(tmp_expression_value_3, mod_consts[1]);
	254	if (tmp_attribute_value_3 == NULL) {
	255	assert(ERROR_OCCURRED());
	256
	257	FETCH_ERROR_OCCURRED(&exception_type, &exception_value, &exception_tb);
	258
	259
	260	exception_lineno = 35;		242	exception_lineno = 35;
	261	type_description_1 = "oo";		243	type_description_1 = "oo";
	262	goto frame_exception_exit_1;		244	goto frame_exception_exit_1;
	263	}		245	}
t	264	Py_DECREF(tmp_attribute_value_3);	t	246	Py_DECREF(tmp_attribute_value_2);
	265	}		247	}
	266			248
	267	#if 0		249	#if 0
	268	RESTORE_FRAME_EXCEPTION(frame_68cd91dbdbb1cf0ec83322bd313cd79d);		250	RESTORE_FRAME_EXCEPTION(frame_68cd91dbdbb1cf0ec83322bd313cd79d);
	269	#endif		251	#endif