tags-cache: directly perform a monimal walk for hgtagsfnodescache warming
We do something narrower than the path retrieving data. So lets use dedicated
code instead.
This provides further useful speedup:
### data-env-vars.name = mozilla-try-2023-03-22-zstd-sparse-revlog
# benchmark.name = hg.debug.debug-update-cache
# bin-env-vars.hg.flavor = default
# bin-env-vars.hg.py-re2-module = default
# benchmark.variants.pre-state = warm
before-this-series: 19.947581
skip-fnode-filter: 18.916804 (-5.17%, -1.03)
use-rev-num: 17.493725 (-12.30%, -2.45)
this-changesets: 15.919466 (-20.19%, -4.03)
# logexceptions.py - Write files containing info about Mercurial exceptions
#
# Copyright 2017 Olivia Mackall <olivia@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import inspect
import os
import sys
import traceback
import uuid
from mercurial import (
dispatch,
extensions,
)
def handleexception(orig, ui):
res = orig(ui)
if not ui.environ.get(b'HGEXCEPTIONSDIR'):
return res
dest = os.path.join(
ui.environ[b'HGEXCEPTIONSDIR'], str(uuid.uuid4()).encode('ascii')
)
exc_type, exc_value, exc_tb = sys.exc_info()
stack = []
tb = exc_tb
while tb:
stack.append(tb)
tb = tb.tb_next
stack.reverse()
hgframe = 'unknown'
hgline = 'unknown'
# Find the first Mercurial frame in the stack.
for tb in stack:
mod = inspect.getmodule(tb)
if not mod.__name__.startswith(('hg', 'mercurial')):
continue
frame = tb.tb_frame
try:
with open(inspect.getsourcefile(tb), 'r') as fh:
hgline = fh.readlines()[frame.f_lineno - 1].strip()
except (IndexError, OSError):
pass
hgframe = '%s:%d' % (frame.f_code.co_filename, frame.f_lineno)
break
primary = traceback.extract_tb(exc_tb)[-1]
primaryframe = '%s:%d' % (primary.filename, primary.lineno)
with open(dest, 'wb') as fh:
parts = [
str(exc_value),
primaryframe,
hgframe,
hgline,
ui.environ[b'TESTNAME'].decode('utf-8', 'replace'),
]
fh.write(b'\0'.join(p.encode('utf-8', 'replace') for p in parts))
def extsetup(ui):
extensions.wrapfunction(dispatch, 'handlecommandexception', handleexception)