stream-clone: disable gc for the entry listing section for the v2 format
This is similar to the change we did for the v3 format in 6e4c8366c5ce.
The benchmark bellow show this gives us a notable gains, especially on larger
repositories.
### benchmark.name = hg.perf.stream-locked-section
# benchmark.name = hg.perf.stream-locked-section
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.version = v2
## data-env-vars.name = pypy-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 0.503820 ~~~~~
1106d1bf695e: 0.470078 (-6.70%, -0.03)
## data-env-vars.name = pypy-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 0.535756 ~~~~~
1106d1bf695e: 0.490249 (-8.49%, -0.05)
## data-env-vars.name = heptapod-public-2024-03-25-zstd-sparse-revlog
5e931bf8707c: 1.327041 ~~~~~
1106d1bf695e: 1.174636 (-11.48%, -0.15)
## data-env-vars.name = netbeans-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 2.439158 ~~~~~
1106d1bf695e: 2.220515 (-8.96%, -0.22)
## data-env-vars.name = netbeans-2019-11-07-zstd-sparse-revlog
5e931bf8707c: 2.630794 ~~~~~
1106d1bf695e: 2.261473 (-14.04%, -0.37)
## data-env-vars.name = mozilla-central-2018-08-01-zstd-sparse-revlog
5e931bf8707c: 5.769002 ~~~~~
1106d1bf695e: 5.062000 (-12.26%, -0.71)
## data-env-vars.name = mozilla-try-2019-02-18-zstd-sparse-revlog
5e931bf8707c: 13.351750 ~~~~~
1106d1bf695e: 12.346655 (-7.53%, -1.01)
## data-env-vars.name = mozilla-central-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 10.772939 ~~~~~
1106d1bf695e: 9.495407 (-11.86%, -1.28)
## data-env-vars.name = mozilla-unified-2024-03-22-zstd-sparse-revlog
5e931bf8707c: 10.864297 ~~~~~
1106d1bf695e: 9.475597 (-12.78%, -1.39)
## data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
5e931bf8707c: 17.448335 ~~~~~
1106d1bf695e: 16.027474 (-8.14%, -1.42)
#!/usr/bin/env python3
#
# check-perf-code - (historical) portability checker for contrib/perf.py
import os
import sys
# write static check patterns here
perfpypats = [
[
(
r'(branchmap|repoview|repoviewutil)\.subsettable',
"use getbranchmapsubsettable() for early Mercurial",
),
(
r'\.(vfs|svfs|opener|sopener)',
"use getvfs()/getsvfs() for early Mercurial",
),
(
r'ui\.configint',
"use getint() instead of ui.configint() for early Mercurial",
),
],
# warnings
[],
]
def modulewhitelist(names):
replacement = [
('.py', ''),
('.c', ''), # trim suffix
('mercurial%s' % '/', ''), # trim "mercurial/" path
]
ignored = {'__init__'}
modules = {}
# convert from file name to module name, and count # of appearances
for name in names:
name = name.strip()
for old, new in replacement:
name = name.replace(old, new)
if name not in ignored:
modules[name] = modules.get(name, 0) + 1
# list up module names, which appear multiple times
whitelist = []
for name, count in modules.items():
if count > 1:
whitelist.append(name)
return whitelist
if __name__ == "__main__":
# in this case, it is assumed that result of "hg files" at
# multiple revisions is given via stdin
whitelist = modulewhitelist(sys.stdin)
assert whitelist, "module whitelist is empty"
# build up module whitelist check from file names given at runtime
perfpypats[0].append(
# this matching pattern assumes importing modules from
# "mercurial" package in the current style below, for simplicity
#
# from mercurial import (
# foo,
# bar,
# baz
# )
(
(
r'from mercurial import [(][a-z0-9, \n#]*\n(?! *%s,|^[ #]*\n|[)])'
% ',| *'.join(whitelist)
),
"import newer module separately in try clause for early Mercurial",
)
)
# import contrib/check-code.py as checkcode
assert 'RUNTESTDIR' in os.environ, "use check-perf-code.py in *.t script"
contribpath = os.path.join(os.environ['RUNTESTDIR'], '..', 'contrib')
sys.path.insert(0, contribpath)
checkcode = __import__('check-code')
# register perf.py specific entry with "checks" in check-code.py
checkcode.checks.append(
('perf.py', r'contrib/perf.py$', '', checkcode.pyfilters, perfpypats)
)
sys.exit(checkcode.main())