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# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
# Copyright 2019 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with qutebrowser. If not, see <http://www.gnu.org/licenses/>.
"""Implementation of the command debug-cache-stats.
Because many modules depend on this command, this needs to have as few
dependencies as possible to avoid cyclic dependencies.
"""
import typing
# The second element of each tuple should be a lru_cache wrapped function
_CACHE_FUNCTIONS = [] # type: typing.List[typing.Tuple[str, typing.Any]]
_T = typing.TypeVar('_T', bound=typing.Callable)
def register(name: typing.Optional[str] = None) -> typing.Callable[[_T], _T]:
"""Register a lru_cache wrapped function for debug_cache_stats."""
def wrapper(fn: _T) -> _T:
_CACHE_FUNCTIONS.append((fn.__name__ if name is None else name, fn))
return fn
return wrapper
def debug_cache_stats() -> None:
"""Print LRU cache stats."""
from qutebrowser.utils import log
for name, fn in _CACHE_FUNCTIONS:
log.misc.info('{}: {}'.format(name, fn.cache_info()))
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