Attempt to address memory leak described in #198 #214
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
dairiki
force-pushed
the
bug.198-memory-leak
branch
from
9ddd43c to
5123577
Compare
dairiki
force-pushed
the
bug.198-memory-leak
branch
2 times, most recently
from
c52cce0 to
766cd57
Compare
|
Other things that could maybe go into
|
Here we are more careful about which caller's locals we use to
resolve forward type references. We want the callers locals
at decoration-time — not at decorator-construction time.
Consider:
```py
frozen_dataclass = marshmallow_dataclass.dataclass(frozen=True)
def f():
@custom_dataclass
class A:
b: "B"
@custom_dataclass
class B:
x: int
```
The locals we want in this case are the one from where the
custom_dataclass decorator is called, not from where
marshmallow_dataclass.dataclass is called.
When class_schema is called, it doesn't need the caller's whole stack frame. What it really wants is a `localns` to pass to `typing.get_type_hints` to be used to resolve type references. Here we add the ability to pass an explicit `localns` parameter to `class_schema`. We also add the ability to pass an explicit `globalns`, because ... might as well — it might come in useful. (Since we need these only to pass to `get_type_hints`, we might as well match `get_type_hints` API as closely as possible.)
dairiki
force-pushed
the
bug.198-memory-leak
branch
from
766cd57 to
9093446
Compare
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Here's a sort of rough and minimal crack at addressing #198.
The main change here is to avoid stack frames winding up in the LRU cache keys by passing the frames in a thread-local global.
I have a nagging feeling that there must be a cleaner way to address this, but this is the best I've come up with so far.
Suggestions welcome.
Bugs Fixed
Fixes #198
Fixes #229