Fix ssl context being recreated frequently in httpx (#89932)

* Fix ssl context being created every time in httpx

* its expensive, only do it once

homeassistant/helpers/aiohttp_client.py

@@ -271,7 +271,7 @@ def _async_get_connector(
         return cast(aiohttp.BaseConnector, hass.data[key])
 
     if verify_ssl:
-        ssl_context: bool | SSLContext = ssl_util.client_context()
+        ssl_context: bool | SSLContext = ssl_util.get_default_context()
     else:
         ssl_context = False
 

homeassistant/helpers/httpx_client.py

@@ -11,6 +11,7 @@ from typing_extensions import Self
 from homeassistant.const import APPLICATION_NAME, EVENT_HOMEASSISTANT_CLOSE, __version__
 from homeassistant.core import Event, HomeAssistant, callback
 from homeassistant.loader import bind_hass
+from homeassistant.util import ssl as ssl_util
 
 from .frame import warn_use
 
@@ -65,7 +66,7 @@ def create_async_httpx_client(
     This method must be run in the event loop.
     """
     client = HassHttpXAsyncClient(
-        verify=verify_ssl,
+        verify=ssl_util.get_default_context() if verify_ssl else False,
         headers={USER_AGENT: SERVER_SOFTWARE},
         **kwargs,
     )

homeassistant/util/ssl.py

@@ -16,6 +16,15 @@ def client_context() -> ssl.SSLContext:
     return ssl.create_default_context(purpose=ssl.Purpose.SERVER_AUTH, cafile=cafile)
 
 
+# Create this only once and reuse it
+_DEFAULT_SSL_CONTEXT = client_context()
+
+
+def get_default_context() -> ssl.SSLContext:
+    """Return the default SSL context."""
+    return _DEFAULT_SSL_CONTEXT
+
+
 def server_context_modern() -> ssl.SSLContext:
     """Return an SSL context following the Mozilla recommendations.