view .hgignore @ 51592:24844407fa0d

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)

syntax: glob

*.elc
*.tmp
*.orig
*.rej
*~
*.mergebackup
*.o
*.so
*.dll
*.exe
*.pyd
*.pyc
*.pyo
*$py.class
*.swp
*.prof
*.zip
\#*\#
.\#*
result/
tests/artifacts/cache/big-file-churn.hg
tests/.coverage*
tests/.testtimes*
# the file is written in the CWD when run-tests is run.
.testtimes
tests/.hypothesis
tests/hypothesis-generated
tests/annotated
tests/exceptions
tests/python3
tests/*.err
tests/htmlcov
build
contrib/chg/chg
contrib/hgsh/hgsh
contrib/vagrant/.vagrant
contrib/merge-lists/target/
dist
packages
doc/common.txt
doc/*.[0-9]
doc/*.[0-9].txt
doc/*.[0-9].gendoc.txt
doc/*.[0-9].{x,ht}ml
MANIFEST
MANIFEST.in
patches
mercurial/__modulepolicy__.py
mercurial/__version__.py
mercurial/hgpythonlib.h
mercurial.egg-info
.DS_Store
tags
cscope.*
.vscode/*
.idea/*
.asv/*
.pytype/*
.mypy_cache
i18n/hg.pot
locale/*/LC_MESSAGES/hg.mo
hgext/__index__.py

rust/target/
rust/*/target/

# Generated wheels
wheelhouse/

syntax: rootglob
# See Profiling in rust/README.rst
.cargo/config

syntax: regexp
^\.pc/
^\.(pydev)?project

# hackable windows distribution additions
^hg-python
^hg.py$