Cache serialize of manifest for loaded integrations (#117965)

* Cache serialize of manifest for loaded integrations

The manifest/list and manifest/get websocket apis
are called frequently when moving around in the UI.
Since the manifest does not change we can make
the the serialized version a cached property

* reduce

* reduce

homeassistant/components/websocket_api/commands.py

@@ -46,10 +46,10 @@ from homeassistant.helpers.json import (
     ExtendedJSONEncoder,
     find_paths_unserializable_data,
     json_bytes,
+    json_fragment,
 )
 from homeassistant.helpers.service import async_get_all_descriptions
 from homeassistant.loader import (
-    Integration,
     IntegrationNotFound,
     async_get_integration,
     async_get_integration_descriptions,
@@ -505,19 +505,15 @@ async def handle_manifest_list(
     hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
 ) -> None:
     """Handle integrations command."""
-    wanted_integrations = msg.get("integrations")
-    if wanted_integrations is None:
-        wanted_integrations = async_get_loaded_integrations(hass)
-
-    ints_or_excs = await async_get_integrations(hass, wanted_integrations)
-    integrations: list[Integration] = []
+    ints_or_excs = await async_get_integrations(
+        hass, msg.get("integrations") or async_get_loaded_integrations(hass)
+    )
+    manifest_json_fragments: list[json_fragment] = []
     for int_or_exc in ints_or_excs.values():
         if isinstance(int_or_exc, Exception):
             raise int_or_exc
-        integrations.append(int_or_exc)
-    connection.send_result(
-        msg["id"], [integration.manifest for integration in integrations]
-    )
+        manifest_json_fragments.append(int_or_exc.manifest_json_fragment)
+    connection.send_result(msg["id"], manifest_json_fragments)
 
 
 @decorators.websocket_command(
@@ -530,9 +526,10 @@ async def handle_manifest_get(
     """Handle integrations command."""
     try:
         integration = await async_get_integration(hass, msg["integration"])
-        connection.send_result(msg["id"], integration.manifest)
     except IntegrationNotFound:
         connection.send_error(msg["id"], const.ERR_NOT_FOUND, "Integration not found")
+    else:
+        connection.send_result(msg["id"], integration.manifest_json_fragment)
 
 
 @callback

homeassistant/loader.py

@@ -39,6 +39,7 @@ from .generated.mqtt import MQTT
 from .generated.ssdp import SSDP
 from .generated.usb import USB
 from .generated.zeroconf import HOMEKIT, ZEROCONF
+from .helpers.json import json_bytes, json_fragment
 from .util.hass_dict import HassKey
 from .util.json import JSON_DECODE_EXCEPTIONS, json_loads
 
@@ -762,6 +763,11 @@ class Integration:
         self._top_level_files = top_level_files or set()
         _LOGGER.info("Loaded %s from %s", self.domain, pkg_path)
 
+    @cached_property
+    def manifest_json_fragment(self) -> json_fragment:
+        """Return manifest as a JSON fragment."""
+        return json_fragment(json_bytes(self.manifest))
+
     @cached_property
     def name(self) -> str:
         """Return name."""

tests/test_loader.py

@@ -15,6 +15,8 @@ from homeassistant.components import http, hue
 from homeassistant.components.hue import light as hue_light
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import frame
+from homeassistant.helpers.json import json_dumps
+from homeassistant.util.json import json_loads
 
 from .common import MockModule, async_get_persistent_notifications, mock_integration
 
@@ -1959,3 +1961,12 @@ async def test_hass_helpers_use_reported(
             "Detected that custom integration 'test_integration_frame' "
             "accesses hass.helpers.aiohttp_client. This is deprecated"
         ) in caplog.text
+
+
+async def test_manifest_json_fragment_round_trip(hass: HomeAssistant) -> None:
+    """Test json_fragment roundtrip."""
+    integration = await loader.async_get_integration(hass, "hue")
+    assert (
+        json_loads(json_dumps(integration.manifest_json_fragment))
+        == integration.manifest
+    )