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

  $ hg init repo

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  $ cd repo

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     4

  $ touch a.html b.html c.py d.py

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     6

  $ cat > frontend.sparse << EOF

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  > [include]

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  > *.html

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  > EOF

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  $ hg -q commit -A -m initial

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  $ echo 1 > a.html

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  $ echo 1 > c.py

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  $ hg commit -m 'commit 1'

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Enable sparse profile

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  $ hg debugrequires

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  dotencode

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  dirstate-v2 (dirstate-v2 !)

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  fncache

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  generaldelta

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  persistent-nodemap (rust !)

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  revlog-compression-zstd (zstd !)

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  revlogv1

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  share-safe

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  sparserevlog

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  store

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  testonly-simplestore (reposimplestore !)

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  $ hg debugsparse --config extensions.sparse= --enable-profile frontend.sparse

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  $ ls -A

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  .hg

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  a.html

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  b.html

    37

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Requirement for sparse added when sparse is enabled

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  $ hg debugrequires --config extensions.sparse=

    41

  dotencode

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  dirstate-v2 (dirstate-v2 !)

    43

  exp-sparse

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  fncache

    45

  generaldelta

    46

  persistent-nodemap (rust !)

    47

  revlog-compression-zstd (zstd !)

    48

  revlogv1

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  share-safe

    50

  sparserevlog

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  store

    52

  testonly-simplestore (reposimplestore !)

    53

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Client without sparse enabled reacts properly

    55

    56

  $ hg files

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  abort: repository is using sparse feature but sparse is not enabled; enable the "sparse" extensions to access

    58

  [255]

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Requirement for sparse is removed when sparse is disabled

    61

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  $ hg debugsparse --reset --config extensions.sparse=

    63

    64

  $ hg debugrequires

    65

  dotencode

    66

  dirstate-v2 (dirstate-v2 !)

    67

  fncache

    68

  generaldelta

    69

  persistent-nodemap (rust !)

    70

  revlog-compression-zstd (zstd !)

    71

  revlogv1

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  share-safe

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  sparserevlog

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  store

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  testonly-simplestore (reposimplestore !)

    76

    77

And client without sparse can access

    78

    79

  $ hg files

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  a.html

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  b.html

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  c.py

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  d.py

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  frontend.sparse