/usr/share/pyshared/traits/tests/check_timing.py is in python-traits 4.1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in /LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: David C. Morrill
# Date: 03/03/2003
# Description: Perform timing tests on various trait styles to determine the
# amount of overhead that traits add.
#------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports:
#-------------------------------------------------------------------------------
from __future__ import absolute_import
from time import time
from ..api import Any, Delegate, HasTraits, Int, Range
print 'OK!'
#-------------------------------------------------------------------------------
# Constants:
#-------------------------------------------------------------------------------
# Number of iterations to perform:
n = 1000000
# Loop overhead time (actual value determined first time a measurement is made):
t0 = -1.0
#-------------------------------------------------------------------------------
# Measure how long it takes to execute a specified function:
#-------------------------------------------------------------------------------
def measure ( func ):
now = time()
func()
return time() - now
#-------------------------------------------------------------------------------
# 'Old style' Python attribute get/set:
#-------------------------------------------------------------------------------
class old_style_value:
def measure ( self ):
global t0
self.init()
if t0 < 0.0:
t0 = measure( self.null )
t1 = measure( self.do_get )
t2 = measure( self.do_set )
scale = 1.0e6 / n
print self.__class__.__name__ + ':'
print ' get: %.2f usec' % (max( t1 - t0, 0.0 ) * scale)
print ' set: %.2f usec' % (max( t2 - t0, 0.0 ) * scale)
print
def null ( self ):
for i in range(n):
pass
def init ( self ):
self.value = -1
def do_set ( self ):
for i in range(n):
self.value = i
def do_get ( self ):
for i in range(n):
self.value
#-------------------------------------------------------------------------------
# 'New style' Python attribute get/set:
#-------------------------------------------------------------------------------
class new_style_value ( object ):
def measure ( self ):
global t0
self.init()
if t0 < 0.0:
t0 = measure( self.null )
t1 = measure( self.do_get )
t2 = measure( self.do_set )
scale = 1.0e6 / n
print self.__class__.__name__ + ':'
print ' get: %.2f usec' % (max( t1 - t0, 0.0 ) * scale)
print ' set: %.2f usec' % (max( t2 - t0, 0.0 ) * scale)
print
def null ( self ):
for i in range(n):
pass
def init ( self ):
self.value = -1
def do_set ( self ):
for i in range(n):
self.value = i
def do_get ( self ):
for i in range(n):
self.value
#-------------------------------------------------------------------------------
# Python 'property' get/set:
#-------------------------------------------------------------------------------
class property_value ( new_style_value ):
def get_value ( self ):
return self._value
def set_value ( self, value ):
self._value = value
value = property( get_value, set_value )
#-------------------------------------------------------------------------------
# Python 'global' get/set:
#-------------------------------------------------------------------------------
class global_value ( new_style_value ):
def init ( self ):
global gvalue
gvalue = -1
def do_set ( self ):
global gvalue
for i in range(n):
gvalue = i
def do_get ( self ):
global gvalue
for i in range(n):
gvalue
#-------------------------------------------------------------------------------
# Trait that can have any value:
#-------------------------------------------------------------------------------
class any_value ( HasTraits, new_style_value ):
value = Any
#-------------------------------------------------------------------------------
# Trait that can only have 'float' values:
#-------------------------------------------------------------------------------
class int_value ( any_value ):
value = Int
#-------------------------------------------------------------------------------
# Trait that can only have 'range' values:
#-------------------------------------------------------------------------------
class range_value ( any_value ):
value = Range( -1, 2000000000 )
#-------------------------------------------------------------------------------
# Executes method when float trait is changed:
#-------------------------------------------------------------------------------
class change_value ( int_value ):
def _value_changed ( self, old, new ):
pass
#-------------------------------------------------------------------------------
# Notifies handler when float trait is changed:
#-------------------------------------------------------------------------------
class monitor_value ( int_value ):
def init ( self ):
self.on_trait_change( self.on_value_change, 'value' )
def on_value_change ( self, object, trait_name, old, new ):
pass
#-------------------------------------------------------------------------------
# Float trait is delegated to another object:
#-------------------------------------------------------------------------------
class delegate_value ( HasTraits, new_style_value ):
value = Delegate( 'delegate' )
delegate = Any
def init ( self ):
self.delegate = int_value()
#-------------------------------------------------------------------------------
# Float trait is delegated through one object to another object:
#-------------------------------------------------------------------------------
class delegate_2_value ( delegate_value ):
def init ( self ):
self.delegate = delegate_value()
self.delegate.init()
#-------------------------------------------------------------------------------
# Float trait is delegated through two objects to another object:
#-------------------------------------------------------------------------------
class delegate_3_value ( delegate_value ):
def init ( self ):
self.delegate = delegate_2_value()
self.delegate.init()
#-------------------------------------------------------------------------------
# Run the timing measurements:
#-------------------------------------------------------------------------------
if __name__ == '__main__':
old_style_value().measure()
new_style_value().measure()
property_value().measure()
global_value().measure()
any_value().measure()
int_value().measure()
range_value().measure()
change_value().measure()
monitor_value().measure()
delegate_value().measure()
delegate_2_value().measure()
delegate_3_value().measure()
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