Construct LocalVariableAccess

Performance Diagrams

Construct LocalVariableAccess 001000000100000020000002000000300000030000004000000400000050000005000000600000060000007000000700000080000008000000CPython 2.7Nuitka (master)Nuitka (develop)Nuitka (factory)853603689.78846153846155257.00000000000006CPython 2.72450325244.59615384615387433.17929615375067Nuitka (master)2450007399.4038461538462433.1885021472947Nuitka (develop)2450055554.2115384615385433.1871125633635Nuitka (factory)Construct LocalVariableAccessTicks Construct LocalVariableAccess 001000000100000020000002000000300000030000004000000400000050000005000000600000060000007000000700000080000008000000CPython 3.5Nuitka (master)Nuitka (develop)Nuitka (factory)842013589.78846153846155257.0CPython 3.52903607244.59615384615387418.89989097105195Nuitka (master)2899951399.4038461538462419.0071878072848Nuitka (develop)2886863554.2115384615385419.3912963938866Nuitka (factory)Construct LocalVariableAccessTicks

Source Code with Construct

module_value1 = 1000
module_value2 = None
module_value3 = None

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

    local_value = module_value1

    # Use writing to global variable as access method.
    global module_value2, module_value3

# construct_begin
    module_value2 = local_value
# construct_end

    module_value3 = local_value

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

print("OK.")

Source Code without Construct

module_value1 = 1000
module_value2 = None
module_value3 = None

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

    local_value = module_value1

    # Use writing to global variable as access method.
    global module_value2, module_value3

# construct_begin



    module_value3 = local_value

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

print("OK.")

Context Diff of Source Code


Construct
Baseline
29 29
30     # Use writing to global variable as access method. 30     # Use writing to global variable as access method.
31     global module_value2, module_value3 31     global module_value2, module_value3
32 32
33 # construct_begin 33 # construct_begin
t 34     module_value2 = local_value t 34  
35 # construct_end 35  
36 36
37     module_value3 = local_value 37     module_value3 = local_value
38 38
39 import itertools 39 import itertools
40 for x in itertools.repeat(None, 50000): 40 for x in itertools.repeat(None, 50000):

Context Diff of Generated Code


Construct
Baseline
257     frame_no_exception_1:; 257     frame_no_exception_1:;
258     { 258     {
259     PyObject *tmp_assign_source_2; 259     PyObject *tmp_assign_source_2;
260     CHECK_OBJECT( var_local_value ); 260     CHECK_OBJECT( var_local_value );
261     tmp_assign_source_2 = var_local_value; 261     tmp_assign_source_2 = var_local_value;
t 262     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value2, tmp_assign_source_2 ); t 262     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value3, tmp_assign_source_2 );
263     }
264     {
265     PyObject *tmp_assign_source_3;
266     CHECK_OBJECT( var_local_value );
267     tmp_assign_source_3 = var_local_value;
268     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value3, tmp_assign_source_3 );
269     } 263     }
270     { 264     {
271     tmp_return_value = Py_None; 265     tmp_return_value = Py_None;
272     Py_INCREF( tmp_return_value ); 266     Py_INCREF( tmp_return_value );
273     goto try_return_handler_1; 267     goto try_return_handler_1;