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SCons / timings / CPPPATH / TimeSCons-run.py

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#
# __COPYRIGHT__
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"""
This configuration times searching long lists of CPPPATH directories.

We create $DIR_COUNT on-disk directories.  A single checked-in .h file
exists in the 'include' directory.  The SConstruct sets CPPPATH to a
list of Dir Nodes for the created directories, followed by 'include'.
A checked-in .c file #includes the .h file to be found in the last
directory in the list.
"""

import TestSCons

# Full-build time of just under 10 seconds on ubuntu-timings slave,
# as determined by bin/calibrate.py on 9 December 2009:
#
# run   1:   2.235:  DIR_COUNT=50
# run   2:   3.976:  DIR_COUNT=223
# run   3:   7.353:  DIR_COUNT=560
# run   4:   9.569:  DIR_COUNT=761
# run   5:   9.353:  DIR_COUNT=761
# run   6:   9.972:  DIR_COUNT=813
# run   7:   9.930:  DIR_COUNT=813
# run   8:   9.983:  DIR_COUNT=813

test = TestSCons.TimeSCons(variables={'DIR_COUNT':813})

for d in range(test.variables['DIR_COUNT']):
    test.subdir('inc_%04d' % d)

test.main()

test.pass_test()