Make caching more efficient

homeassistant/components/usage_prediction/__init__.py

@@ -67,21 +67,17 @@ async def get_cached_common_control(
     # Create a unique storage key for this user
     storage_key = f"{STORAGE_KEY_PREFIX}.{user_id}"
 
-    # Get or create store for this user
     if storage_key not in hass.data[DOMAIN]:
-        hass.data[DOMAIN][storage_key] = Store[dict[str, Any]](
+        store = Store[dict[str, Any]](hass, STORAGE_VERSION, storage_key)
-            hass, STORAGE_VERSION, storage_key, private=True
+        cached_data: dict[str, Any] | None = await store.async_load()
-        )
+        hass.data[DOMAIN][storage_key] = cached_data
 
-    store: Store[dict[str, Any]] = hass.data[DOMAIN][storage_key]
+    cached_data = hass.data[DOMAIN].get(storage_key)
-
-    # Load cached data
-    cached_data = await store.async_load()
 
     # Check if cache is valid (less than 24 hours old)
     now = dt_util.utcnow()
     if cached_data is not None:
-        cached_time = dt_util.parse_datetime(cached_data.get("timestamp", ""))
+        cached_time = dt_util.parse_datetime(cached_data["timestamp"])
         if cached_time and (now - cached_time) < CACHE_DURATION:
             # Cache is still valid, return the cached predictions
             return cached_data["predictions"]
@@ -90,12 +86,14 @@ async def get_cached_common_control(
     predictions = await common_control.async_predict_common_control(hass, user_id)
 
     # Store the new data with timestamp
-    cache_data = {
+    cached_data = {
         "timestamp": now.isoformat(),
         "predictions": predictions,
     }
 
     # Save to cache
-    await store.async_save(cache_data)
+    store = Store[dict[str, Any]](hass, STORAGE_VERSION, storage_key)
+    store.async_delay_save(lambda: cached_data)
+    hass.data[DOMAIN][storage_key] = cached_data
 
     return predictions

tests/components/usage_prediction/test_websocket.py

@@ -1,7 +1,8 @@
 """Test usage_prediction WebSocket API."""
 
 from collections.abc import Generator
-from datetime import timedelta
+from copy import deepcopy
+from datetime import datetime, timedelta
 from unittest.mock import Mock, patch
 
 from freezegun import freeze_time
@@ -66,12 +67,13 @@ async def test_caching_behavior(
     assert await async_setup_component(hass, "usage_prediction", {})
 
     client = await hass_ws_client(hass)
-    now = dt_util.utcnow()
+    now = datetime(2026, 8, 26, 9, 0, 0, tzinfo=dt_util.DEFAULT_TIME_ZONE)
 
     # First call should fetch from database
     with freeze_time(now):
         await client.send_json({"id": 1, "type": "usage_prediction/common_control"})
         msg = await client.receive_json()
+
     assert msg["success"] is True
     assert msg["result"] == {
         "entities": [
@@ -80,12 +82,15 @@ async def test_caching_behavior(
     }
     assert mock_predict_common_control.call_count == 1
 
-    mock_predict_common_control.return_value["morning"].append("light.bla")
+    new_result = deepcopy(mock_predict_common_control.return_value)
+    new_result["morning"].append("light.bla")
+    mock_predict_common_control.return_value = new_result
 
     # Second call within 24 hours should use cache
     with freeze_time(now + timedelta(hours=23)):
         await client.send_json({"id": 2, "type": "usage_prediction/common_control"})
         msg = await client.receive_json()
+
     assert msg["success"] is True
     assert msg["result"] == {
         "entities": [
@@ -99,6 +104,7 @@ async def test_caching_behavior(
     with freeze_time(now + timedelta(hours=25)):
         await client.send_json({"id": 3, "type": "usage_prediction/common_control"})
         msg = await client.receive_json()
+
     assert msg["success"] is True
     assert msg["result"] == {"entities": ["light.kitchen", "light.bla"]}
     # Should now be 2 (new database call)