happyz
/
fastapi
mirror of https://github.com/tiangolo/fastapi.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge 6240dc105a into 0127069d47

This commit is contained in:
Charis Nikolaidis 2026-03-16 10:21:04 +00:00 committed by GitHub
parent 0127069d47 6240dc105a
commit 3ebace66a5
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
fastapi/routing.py
View File

@ -4,6 +4,7 @@ import functools
import inspect import inspect
import json import json
import types import types
import weakref
from collections.abc import ( from collections.abc import (
AsyncIterator, AsyncIterator,
Awaitable, Awaitable,
@ -247,16 +248,19 @@ class _DefaultLifespan:
return self return self
# Cache for endpoint context to avoid re-extracting on every request # Cache for endpoint context to avoid re-extracting on every request.
_endpoint_context_cache: dict[int, EndpointContext] = {} # Uses WeakKeyDictionary so entries are automatically evicted when the endpoint
# function is garbage collected (e.g., when a dynamically created FastAPI app is
# destroyed), preventing both memory leaks and stale-ID lookups.
_endpoint_context_cache: weakref.WeakKeyDictionary[
Callable[..., Any], EndpointContext
] = weakref.WeakKeyDictionary()
def _extract_endpoint_context(func: Any) -> EndpointContext: def _extract_endpoint_context(func: Any) -> EndpointContext:
"""Extract endpoint context with caching to avoid repeated file I/O.""" """Extract endpoint context with caching to avoid repeated file I/O."""
func_id = id(func) if func in _endpoint_context_cache:
return _endpoint_context_cache[func]
if func_id in _endpoint_context_cache:
return _endpoint_context_cache[func_id]
try: try:
ctx: EndpointContext = {} ctx: EndpointContext = {}
@ -270,7 +274,7 @@ def _extract_endpoint_context(func: Any) -> EndpointContext:
except Exception: except Exception:
ctx = EndpointContext() ctx = EndpointContext()
_endpoint_context_cache[func_id] = ctx _endpoint_context_cache[func] = ctx
return ctx return ctx