upstream/mercurial-mirror Files · contrib/fuzz/dirstate_corpus.py

rust: Preallocate the returned `Vec` in `utils::files::relativize_path`...

rust: Preallocate the returned `Vec` in `utils::files::relativize_path` Profiling `rhg files > /dev/null` on an old snapshot of mozilla-central (with `perf` and the Firefox Profiler: https://github.com/firefox-devtools/profiler/blob/main/docs-user/guide-perf-profiling.md) showed non-trivial time spend in this function and in `realloc`. This change makes the wall-clock time for that process on my machine go from ~190 ms to ~150 ms. Differential Revision: https://phab.mercurial-scm.org/D10199

Kyle Lippincott - - Load All Authors

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      from __future__ import absolute_import, print_function

      import argparse

      import os

      import zipfile

      ap = argparse.ArgumentParser()

      ap.add_argument("out", metavar="some.zip", type=str, nargs=1)

      args = ap.parse_args()

      reporoot = os.path.normpath(os.path.join(os.path.dirname(__file__), '..', '..'))

      dirstate = os.path.join(reporoot, '.hg', 'dirstate')

      with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf:

          if os.path.exists(dirstate):

              with open(dirstate, 'rb') as f:

                  zf.writestr("dirstate", f.read())

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				from __future__ import absolute_import, print_function

				import argparse
				import os
				import zipfile

				ap = argparse.ArgumentParser()
				ap.add_argument("out", metavar="some.zip", type=str, nargs=1)
				args = ap.parse_args()

				reporoot = os.path.normpath(os.path.join(os.path.dirname(__file__), '..', '..'))
				dirstate = os.path.join(reporoot, '.hg', 'dirstate')

				with zipfile.ZipFile(args.out[0], "w", zipfile.ZIP_STORED) as zf:
				if os.path.exists(dirstate):
				with open(dirstate, 'rb') as f:
				zf.writestr("dirstate", f.read())