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test: pin the number of CPU for issue4074 tests...

test: pin the number of CPU for issue4074 tests On machine with an hundreds of CPUs, the "user" CPU time reported can be inflated by the status steps. Since the test especially focus on the diff computation, we restrict the number of CPU to avoid potential issues. Differential Revision: https://phab.mercurial-scm.org/D8112

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      #require no-pure

      A script to generate nasty diff worst-case scenarios:

        $ cat > s.py <<EOF

        > import random

        > for x in range(100000):

        >     print

        >     if random.randint(0, 100) >= 50:

        >         x += 1

        >     print(hex(x))

        > EOF

        $ hg init a

        $ cd a

      Check in a big file:

        $ "$PYTHON" ../s.py > a

        $ hg ci -qAm0

      Modify it:

        $ "$PYTHON" ../s.py > a

      Time a check-in, should never take more than 10 seconds user time:

        $ hg ci --time -m1 --config worker.enabled=no

        time: real .* secs .user [0-9][.].* sys .* (re)

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				#require no-pure

				A script to generate nasty diff worst-case scenarios:

				$ cat > s.py <<EOF
				> import random
				> for x in range(100000):
				> print
				> if random.randint(0, 100) >= 50:
				> x += 1
				> print(hex(x))
				> EOF

				$ hg init a
				$ cd a

				Check in a big file:

				$ "$PYTHON" ../s.py > a
				$ hg ci -qAm0

				Modify it:

				$ "$PYTHON" ../s.py > a

				Time a check-in, should never take more than 10 seconds user time:

				$ hg ci --time -m1 --config worker.enabled=no
				time: real .* secs .user [0-9][.].* sys .* (re)