Construct ClosureVariableAccess

Performance Diagrams

Construct ClosureVariableAccess 001000000100000020000002000000300000030000004000000400000050000005000000600000060000007000000700000080000008000000900000090000001000000010000000CPython 2.7Nuitka (master)Nuitka (develop)Nuitka (factory)1014779388.95192307692307257.0CPython 2.72650145242.31730769230768439.5800121495156Nuitka (master)2650085395.6826923076923439.5814732478132Nuitka (develop)2650163549.0480769230769439.5795738200263Nuitka (factory)Construct ClosureVariableAccessTicks Construct ClosureVariableAccess 00100000010000002000000200000030000003000000400000040000005000000500000060000006000000700000070000008000000800000090000009000000CPython 3.5Nuitka (master)Nuitka (develop)Nuitka (factory)907221389.78846153846155257.0CPython 3.53250548244.59615384615387415.5746482778704Nuitka (master)3249930399.4038461538462415.59148180103523Nuitka (develop)3252408554.2115384615385415.52398427611195Nuitka (factory)Construct ClosureVariableAccessTicks

Source Code with Construct

module_value1 = 1000
module_value2 = None
module_value3 = None

def calledRepeatedly():
    closure_value = module_value1

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

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

# construct_begin
        module_value2 = closure_value
# construct_end

        module_value3 = closure_value

    f()

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():
    closure_value = module_value1

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

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

# construct_begin



        module_value3 = closure_value

    f()

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

print("OK.")

Context Diff of Source Code


Construct
Baseline
30 30
31         # Use writing to global variable as access method. 31         # Use writing to global variable as access method.
32         global module_value2, module_value3 32         global module_value2, module_value3
33 33
34 # construct_begin 34 # construct_begin
t 35         module_value2 = closure_value t 35  
36 # construct_end 36  
37 37
38         module_value3 = closure_value 38         module_value3 = closure_value
39 39
40     f() 40     f()
41 41

Context Diff of Generated Code


Construct
Baseline
417         exception_value = PyUnicode_FromFormat( "free variable '%s' referenced before assignment in enclosing scope", "closure_value" ); 417         exception_value = PyUnicode_FromFormat( "free variable '%s' referenced before assignment in enclosing scope", "closure_value" );
418         exception_tb = NULL; 418         exception_tb = NULL;
419         NORMALIZE_EXCEPTION( &exception_type, &exception_value, &exception_tb ); 419         NORMALIZE_EXCEPTION( &exception_type, &exception_value, &exception_tb );
420         CHAIN_EXCEPTION( exception_value ); 420         CHAIN_EXCEPTION( exception_value );
421 421
n 422         exception_lineno = 35; n
423         type_description_1 = "c";
424         goto frame_exception_exit_1;
425     }
426  
427     tmp_assign_source_1 = PyCell_GET( self->m_closure[0] );
428     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value2, tmp_assign_source_1 );
429     }
430     {
431     PyObject *tmp_assign_source_2;
432     if ( PyCell_GET( self->m_closure[0] ) == NULL )
433     {
434  
435         exception_type = PyExc_NameError;
436         Py_INCREF( exception_type );
437         exception_value = PyUnicode_FromFormat( "free variable '%s' referenced before assignment in enclosing scope", "closure_value" );
438         exception_tb = NULL;
439         NORMALIZE_EXCEPTION( &exception_type, &exception_value, &exception_tb );
440         CHAIN_EXCEPTION( exception_value );
441  
442         exception_lineno = 38; 422         exception_lineno = 38;
443         type_description_1 = "c"; 423         type_description_1 = "c";
444         goto frame_exception_exit_1; 424         goto frame_exception_exit_1;
445     } 425     }
446 426
t 447     tmp_assign_source_2 = PyCell_GET( self->m_closure[0] ); t 427     tmp_assign_source_1 = PyCell_GET( self->m_closure[0] );
448     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value3, tmp_assign_source_2 ); 428     UPDATE_STRING_DICT0( moduledict___main__, (Nuitka_StringObject *)const_str_plain_module_value3, tmp_assign_source_1 );
449     } 429     }
450 430
451 #if 0 431 #if 0
452     RESTORE_FRAME_EXCEPTION( frame_290ca6f8463c68ec964f060011d69a65 ); 432     RESTORE_FRAME_EXCEPTION( frame_290ca6f8463c68ec964f060011d69a65 );
453 #endif 433 #endif