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(5) Add reset() to thread local ContextVar and no-op copy_context() - #2570
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antonpirker merged 7 commits intoDec 19, 2023
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| try: | ||
| from aiocontextvars import ContextVar | ||
| from aiocontextvars import ContextVar, copy_context | ||
| return True, ContextVar | ||
| return True, ContextVar, copy_context | ||
| except ImportError: | ||
| pass | ||
| else: | ||
| # On Python 3.7 contextvars are functional. | ||
| try: | ||
| from contextvars import ContextVar | ||
| from contextvars import ContextVar, copy_context | ||
| return True, ContextVar | ||
| return True, ContextVar, copy_context | ||
| except ImportError: | ||
| pass | ||
| # Fall back to basic thread-local usage. | ||
| from threading import local | ||
| return False, _make_threadlocal_contextvars(local) | ||
| return False, _make_threadlocal_contextvars(local), _make_noop_copy_context() |
50-Course
commented
Dec 11, 2023
Following this MR 👍🏼 looking forward to the updates |
antonpirker
changed the base branch from
feat/new-scopes
to
antonpirker/refactor-hub-transaction-span-continue-traceDecember 11, 2023 16:09
reset() to thread local ContextVar and no-op copy_context()reset() to thread local ContextVar and no-op copy_context()antonpirker
changed the base branch from
antonpirker/refactor-hub-transaction-span-continue-trace
to
feat/new-scopesDecember 11, 2023 16:15
antonpirker
marked this pull request as ready for review
December 14, 2023 14:10
sl0thentr0py
approved these changes
Dec 18, 2023
sl0thentr0py
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I don't yet know how you will use copy_context but this change is fine self-contained
| def reset(self, token): | ||
| # type: (Any) -> None | ||
| self._local.value = getattr(self._original_local, token) | ||
| setattr(self._original_local, token, None) |
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isn't it better to delete here so that it gets GCd?
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Hi @sl0thentr0py, please can you go into the detail about this tradeoff?
Thank you.
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@50-Course If it is not garbage collected it stays in memory. With a lot sets and resets the memory usage could grow without memory being freed.
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Improves the capabilities of our threadlocal context variables, we use when no "real" context variables are available (for example in old Python versions)
This is preparation work for refactoring how we deal with Hubs and Scopes in the future.