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smartset: use native set operations as fast paths...

smartset: use native set operations as fast paths For set operations like "&" and "-", where we know both basesets have their sets ready, and the first set is sorted, use the native Python set operations as a fast path. Note: "+" is not optimized as that will break the ordering. This leads to noticeable improvements on performance: revset | before | after | delta ---------------------------------------------------------------- draft() & draft() & draft() & draft() | 776 | 477 | -39% draft() + draft() + draft() + draft() | 2849 | 2864 | draft() - draft() + draft() - draft() | 943 | 240 | -75% draft() - draft() - draft() - draft() | 557 | 197 | -64% (time measured in microseconds)

Matt Mackall - - Load All Authors

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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 xrange(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

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