Refactor rainmachine to increase chance of reusing the connection

homeassistant/components/rainmachine/__init__.py

@@ -1,7 +1,6 @@
 """Support for RainMachine devices."""
 from __future__ import annotations
 
-import asyncio
 from collections.abc import Callable, Coroutine
 from dataclasses import dataclass
 from datetime import timedelta
@@ -206,13 +205,10 @@ async def async_update_programs_and_zones(
     programs affect zones and certain combinations of zones affect programs.
     """
     data: RainMachineData = hass.data[DOMAIN][entry.entry_id]
-
-    await asyncio.gather(
-        *[
-            data.coordinators[DATA_PROGRAMS].async_refresh(),
-            data.coordinators[DATA_ZONES].async_refresh(),
-        ]
-    )
+    # No gather here to allow http keep-alive to reuse
+    # the connection for each coordinator.
+    await data.coordinators[DATA_PROGRAMS].async_refresh()
+    await data.coordinators[DATA_ZONES].async_refresh()
 
 
 async def async_setup_entry(  # noqa: C901
@@ -302,14 +298,6 @@ async def async_update(api_category: str) -> dict:
 
         return data
 
-    async def async_init_coordinator(
-        coordinator: RainMachineDataUpdateCoordinator,
-    ) -> None:
-        """Initialize a RainMachineDataUpdateCoordinator."""
-        await coordinator.async_initialize()
-        await coordinator.async_config_entry_first_refresh()
-
-    controller_init_tasks = []
     coordinators = {}
     for api_category, update_interval in COORDINATOR_UPDATE_INTERVAL_MAP.items():
         coordinator = coordinators[api_category] = RainMachineDataUpdateCoordinator(
@@ -320,9 +308,11 @@ async def async_init_coordinator(
             update_interval=update_interval,
             update_method=partial(async_update, api_category),
         )
-        controller_init_tasks.append(async_init_coordinator(coordinator))
-
-    await asyncio.gather(*controller_init_tasks)
+        coordinator.async_initialize()
+        # Its generally faster not to gather here so we can
+        # reuse the connection instead of creating a new
+        # connection for each coordinator.
+        await coordinator.async_config_entry_first_refresh()
 
     hass.data.setdefault(DOMAIN, {})
     hass.data[DOMAIN][entry.entry_id] = RainMachineData(

homeassistant/components/rainmachine/util.py

@@ -120,7 +120,8 @@ def __init__(
             self.config_entry.entry_id
         )
 
-    async def async_initialize(self) -> None:
+    @callback
+    def async_initialize(self) -> None:
         """Initialize the coordinator."""
 
         @callback