From 2daccb0e32c67afe12ac265012b2ff089e05773a Mon Sep 17 00:00:00 2001
From: ipeluffo <ipeluffo@gmail.com>
Date: Tue, 14 Apr 2026 11:20:49 +0100
Subject: [PATCH] Enable `slots` option

```
Samples: 200000 - current=156.8 MB  peak=156.8 MB
Samples: 100000 - current=78.4 MB  peak=78.4 MB
Samples: 50000 - current=39.2 MB  peak=39.2 MB
Samples: 1000 - current=0.8 MB  peak=0.8 MB
Samples: 500 - current=0.4 MB  peak=0.4 MB
```
---
 fastapi/dependencies/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fastapi/dependencies/models.py b/fastapi/dependencies/models.py
index b7dac3f29d..85185e067c 100644
--- a/fastapi/dependencies/models.py
+++ b/fastapi/dependencies/models.py
@@ -28,7 +28,7 @@ def _impartial(func: Callable[..., Any]) -> Callable[..., Any]:
     return func
 
 
-@dataclass
+@dataclass(slots=True)
 class Dependant:
     path_params: list[ModelField] = field(default_factory=list)
     query_params: list[ModelField] = field(default_factory=list)