perf: clear vfs audit_cache before each run When generating a stream clone, we spend a large amount of time auditing path. Before this changes, the first run was warming the vfs cache for the other runs, leading to a large runtime difference and a "faulty" reported timing for the operation. We now clear this important cache between run to get a more realistic timing. Below are some example of median time change when clearing these cases. The maximum time for a run did not changed significantly. ### data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog # benchmark.name = hg.perf.exchange.stream.generate # bin-env-vars.hg.flavor = default # bin-env-vars.hg.py-re2-module = default # benchmark.variants.version = latest no-clearing: 17.289905 cache-clearing: 21.587965 (+24.86%, +4.30) ## data-env-vars.name = mozilla-central-2024-03-22-zstd-sparse-revlog no-clearing: 32.670748 cache-clearing: 40.467095 (+23.86%, +7.80) ## data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog no-clearing: 37.838858 cache-clearing: 46.072749 (+21.76%, +8.23) ## data-env-vars.name = mozilla-unified-2024-03-22-zstd-sparse-revlog no-clearing: 32.969395 cache-clearing: 39.646209 (+20.25%, +6.68) In addition, this significantly reduce the timing difference between the performance command, from the perf extensions and a `real `hg bundle` call producing a stream bundle. Some significant differences remain especially on the "mozilla-try" repositories, but they are now smaller. Note that some of that difference will actually not be attributable to the stream generation (like maybe phases or branch map computation). Below are some benchmarks done on a currently draft changeset fixing some unrelated slowness in `hg bundle` (34a78972af409d1ff37c29e60f6ca811ad1a457d) ### data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog # bin-env-vars.hg.flavor = default # bin-env-vars.hg.py-re2-module = default hg.perf.exchange.stream.generate: 21.587965 hg.command.bundle: 24.301799 (+12.57%, +2.71) ## data-env-vars.name = mozilla-central-2024-03-22-zstd-sparse-revlog hg.perf.exchange.stream.generate: 40.467095 hg.command.bundle: 44.831317 (+10.78%, +4.36) ## data-env-vars.name = mozilla-unified-2024-03-22-zstd-sparse-revlog hg.perf.exchange.stream.generate: 39.646209 hg.command.bundle: 45.395258 (+14.50%, +5.75) ## data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog hg.perf.exchange.stream.generate: 46.072749 hg.command.bundle: 55.882608 (+21.29%, +9.81) ## data-env-vars.name = mozilla-try-2023-03-22-zlib-general-delta hg.perf.exchange.stream.generate: 334.716708 hg.command.bundle: 377.856767 (+12.89%, +43.14) ## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog hg.perf.exchange.stream.generate: 302.972301 hg.command.bundle: 326.098755 (+7.63%, +23.13)

     1

Test hg log changeset printer external hook

     2

-------------------------------------------

     3

     4

  $ cat > $TESTTMP/logexthook.py <<EOF

     5

  > import codecs

     6

  > from mercurial import (

     7

  >   commands,

     8

  >   logcmdutil,

     9

  >   repair,

    10

  > )

    11

  > def brot13(b):

    12

  >     return codecs.encode(b.decode('utf8'), 'rot-13').encode('utf8')

    13

  > def rot13description(self, ctx):

    14

  >     description = ctx.description().strip().splitlines()[0]

    15

  >     self.ui.write(b"%s:     %s\n" % (brot13(b"summary"),

    16

  >                                      brot13(description)))

    17

  > def reposetup(ui, repo):

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  >     logcmdutil.changesetprinter._exthook = rot13description

    19

  > EOF

    20

    21

Prepare the repository

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    23

  $ hg init empty

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  $ cd empty

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  $ touch ROOT

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  $ hg commit -A -m "Root" ROOT

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  $ touch a b c

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  $ hg commit -A -m "Add A, B, C" a b c

    30

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Check the log

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  $ hg log --config extensions.t=$TESTTMP/logexthook.py

    34

  changeset:   1:70fc82b23320

    35

  tag:         tip

    36

  user:        test

    37

  date:        Thu Jan 01 00:00:00 1970 +0000

    38

  fhzznel:     Nqq N, O, P

    39

  summary:     Add A, B, C

    40

    41

  changeset:   0:b00443a54871

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  user:        test

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  date:        Thu Jan 01 00:00:00 1970 +0000

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  fhzznel:     Ebbg

    45

  summary:     Root

    46

    47

Check that exthook is working with graph log too

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  $ hg log -G --config extensions.t=$TESTTMP/logexthook.py

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  @  changeset:   1:70fc82b23320

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  |  tag:         tip

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  |  user:        test

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  |  date:        Thu Jan 01 00:00:00 1970 +0000

    54

  |  fhzznel:     Nqq N, O, P

    55

  |  summary:     Add A, B, C

    56

  |

    57

  o  changeset:   0:b00443a54871

    58

     user:        test

    59

     date:        Thu Jan 01 00:00:00 1970 +0000

    60

     fhzznel:     Ebbg

    61

     summary:     Root

    62