Avoid excessive memory usage in cache (#1649)

changelog.md

@@ -1,3 +1,7 @@
+# Version 2024.8.9 (2024-08-20)
+
+- Avoid excessive memory usage in cache
+
 # Version 2024.8.8 (2024-08-18)
 
 - Refactor folder handling

hahomematic/caches/persistent.py

@@ -286,7 +286,7 @@ def __init__(self, central: hmcu.CentralUnit) -> None:
         )
 
         # {(device_address, parameter), [channel_no]}
-        self._address_parameter_cache: Final[dict[tuple[str, str], list[int]]] = {}
+        self._address_parameter_cache: Final[dict[tuple[str, str], set[int]]] = {}
 
     @property
     def raw_paramset_descriptions(self) -> dict[str, dict[str, dict[str, dict[str, Any]]]]:
@@ -399,10 +399,8 @@ def _init_address_parameter_list(self) -> None:
                             device_address,
                             parameter,
                         ) not in self._address_parameter_cache:
-                            self._address_parameter_cache[(device_address, parameter)] = []
-                        self._address_parameter_cache[(device_address, parameter)].append(
-                            channel_no
-                        )
+                            self._address_parameter_cache[(device_address, parameter)] = set()
+                        self._address_parameter_cache[(device_address, parameter)].add(channel_no)
 
     async def load(self) -> DataOperationResult:
         """Load paramset descriptions from disk into paramset cache."""

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name        = "hahomematic"
-version     = "2024.8.8"
+version     = "2024.8.9"
 license     = {text = "MIT License"}
 description = "Homematic interface for Home Assistant running on Python 3."
 readme      = "README.md"