timings/CPPPATH/TimeSCons-run.py

   1 #
   2 # __COPYRIGHT__
   3 #
   4 # Permission is hereby granted, free of charge, to any person obtaining
   5 # a copy of this software and associated documentation files (the
   6 # "Software"), to deal in the Software without restriction, including
   7 # without limitation the rights to use, copy, modify, merge, publish,
   8 # distribute, sublicense, and/or sell copies of the Software, and to
   9 # permit persons to whom the Software is furnished to do so, subject to
  10 # the following conditions:
  11 #
  12 # The above copyright notice and this permission notice shall be included
  13 # in all copies or substantial portions of the Software.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  16 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  17 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 #
  23
  24 """
  25 This configuration times searching long lists of CPPPATH directories.
  26
  27 We create $DIR_COUNT on-disk directories.  A single checked-in .h file
  28 exists in the 'include' directory.  The SConstruct sets CPPPATH to a
  29 list of Dir Nodes for the created directories, followed by 'include'.
  30 A checked-in .c file #includes the .h file to be found in the last
  31 directory in the list.
  32 """
  33
  34 import TestSCons
  35
  36 # Full-build time of just under 10 seconds on ubuntu-timings slave,
  37 # as determined by bin/calibrate.py on 9 December 2009:
  38 #
  39 # run   1:   2.235:  DIR_COUNT=50
  40 # run   2:   3.976:  DIR_COUNT=223
  41 # run   3:   7.353:  DIR_COUNT=560
  42 # run   4:   9.569:  DIR_COUNT=761
  43 # run   5:   9.353:  DIR_COUNT=761
  44 # run   6:   9.972:  DIR_COUNT=813
  45 # run   7:   9.930:  DIR_COUNT=813
  46 # run   8:   9.983:  DIR_COUNT=813
  47
  48 test = TestSCons.TimeSCons(variables={'DIR_COUNT':813})
  49
  50 for d in range(test.variables['DIR_COUNT']):
  51     test.subdir('inc_%04d' % d)
  52
  53 test.main()
  54
  55 test.pass_test()