outgoing: add a simple fastpath when there is no common This further speed up case like `hg bundle --all` for larger repository. ### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog # benchmark.name = hg.command.bundle # bin-env-vars.hg.flavor = default # bin-env-vars.hg.py-re2-module = default # benchmark.variants.revs = all # benchmark.variants.type = none-streamv2 before: 316.749699 after: 311.165461 (-1.76%, -5.58) There is further work to be done in this area like not doing any outgoing computation in the stream case for example. however the recent changes already gives use a large win for a small amount of local work. ### benchmark.name = hg.command.bundle # bin-env-vars.hg.flavor = default # bin-env-vars.hg.py-re2-module = default # benchmark.variants.revs = all # benchmark.variants.type = none-streamv2 ## data-env-vars.name = mercurial-public-2024-03-22-zstd-sparse-revlog pre-%ln-change: 1.263859 the-%ln-change: 0.700229 (-44.60%, -0.56) prev-changeset: 0.496050 (-60.75%, -0.77) this-changeset: 0.495243 (-60.81%, -0.77) ## data-env-vars.name = tryton-public-2024-03-22-zstd-sparse-revlog pre-%ln-change: 2.975765 the-%ln-change: 1.870798 (-37.13%, -1.10) prev-changeset: 1.461583 (-50.88%, -1.51) this-changeset: 1.469185 (-50.63%, -1.51) ## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog pre-%ln-change: 4.540080 the-%ln-change: 3.401700 (-25.07%, -1.14) prev-changeset: 2.915810 (-35.78%, -1.62) this-changeset: 2.911643 (-35.87%, -1.63) ## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog pre-%ln-change: 10.138396 the-%ln-change: 7.750458 (-23.55%, -2.39) prev-changeset: 6.665565 (-34.25%, -3.47) this-changeset: 6.672078 (-34.19%, -3.47) ## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog pre-%ln-change: 399.484481 the-%ln-change: 346.508952 (-13.26%, -52.98) prev-changeset: 316.749699 (-20.71%, -82.73) this-changeset: 311.165461 (-22.11%, -88.32)

     1

     2

  $ cat > writepatterns.py <<EOF

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  > import sys

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  > 

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  > path = sys.argv[1]

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  > patterns = sys.argv[2:]

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  > 

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  > fp = open(path, 'wb')

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  > for pattern in patterns:

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  >     count = int(pattern[0:-1])

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  >     char = pattern[-1].encode('utf8') + b'\n'

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  >     fp.write(char * count)

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  > fp.close()

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  > EOF

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prepare repo

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  $ hg init a

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  $ cd a

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    21

These initial lines of Xs were not in the original file used to generate

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the patch.  So all the patch hunks need to be applied to a constant offset

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within this file.  If the offset isn't tracked then the hunks can be

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applied to the wrong lines of this file.

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  $ "$PYTHON" ../writepatterns.py a 34X 10A 1B 10A 1C 10A 1B 10A 1D 10A 1B 10A 1E 10A 1B 10A

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  $ hg commit -Am adda

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  adding a

    29

    30

This is a cleaner patch generated via diff

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In this case it reproduces the problem when

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the output of hg export does not

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import patch

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  $ hg import -v -m 'b' -d '2 0' - <<EOF

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  > --- a/a	2009-12-08 19:26:17.000000000 -0800

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  > +++ b/a	2009-12-08 19:26:17.000000000 -0800

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  > @@ -9,7 +9,7 @@

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  >  A

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  >  A

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  >  B

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  > -A

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  > +a

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  >  A

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  >  A

    46

  >  A

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  > @@ -53,7 +53,7 @@

    48

  >  A

    49

  >  A

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  >  B

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  > -A

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  > +a

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  >  A

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  >  A

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  >  A

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  > @@ -75,7 +75,7 @@

    57

  >  A

    58

  >  A

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  >  B

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  > -A

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  > +a

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  >  A

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  >  A

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  >  A

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  > EOF

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  applying patch from stdin

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  patching file a

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  Hunk #1 succeeded at 43 (offset 34 lines).

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  Hunk #2 succeeded at 87 (offset 34 lines).

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  Hunk #3 succeeded at 109 (offset 34 lines).

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  committing files:

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  a

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  committing manifest

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  committing changelog

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  created 189885cecb41

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compare imported changes against reference file

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    79

  $ "$PYTHON" ../writepatterns.py aref 34X 10A 1B 1a 9A 1C 10A 1B 10A 1D 10A 1B 1a 9A 1E 10A 1B 1a 9A

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  $ diff aref a

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    82

  $ cd ..