Make checking parallel (faster).

devices.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 import threading
+from concurrent.futures import ThreadPoolExecutor, as_completed
 from datetime import datetime, timedelta
 from pathlib import Path
 
@@ -274,17 +275,28 @@ def _budget_tick():
     if not is_curfew_allowed():
         return
 
+    # Check all devices in parallel
+    online_status = {}
+    with ThreadPoolExecutor(max_workers=3) as executor:
+        futures = {
+            executor.submit(dev_info["check"]): dev_id
+            for dev_id, dev_info in DEVICES.items()
+        }
+        for future in as_completed(futures):
+            dev_id = futures[future]
+            result = future.result()
+            if isinstance(result, dict):
+                online_status[dev_id] = result.get("online", False)
+            else:
+                online_status[dev_id] = bool(result)
+
+    # Process results sequentially (budget operations need to be thread-safe)
     with _timer_lock:
-        for dev_id, dev_info in DEVICES.items():
+        for dev_id, online in online_status.items():
+            dev_info = DEVICES[dev_id]
             state = _load_state()
             current_budget = state.get(dev_id, {}).get("budget", BUDGET_S)
 
-            is_online = dev_info["check"]()
-            if isinstance(is_online, dict):
-                online = is_online.get("online", False)
-            else:
-                online = bool(is_online)
-
             # Expired budget + device back online → shut it down
             if current_budget <= 0 and online:
                 dev_info["turnoff"]()
@@ -342,14 +354,8 @@ def shutdown_all() -> list[dict]:
     return actions
 
 
-def status_all() -> list[dict]:
-    """Get current status + budget for all devices. Returns ordered list."""
-    curfew = curfew_status()
-    actions = []
-    for dev_id, dev_info in DEVICES.items():
-        state = _load_state()
-        budget_seconds = state.get(dev_id, {}).get("budget", BUDGET_S)
-
+def _check_device(dev_id: str, dev_info: dict) -> dict:
+    """Check a single device and return its status dict."""
     is_online = dev_info["check"]()
     if isinstance(is_online, dict):
         online = is_online.get("online", False)
@@ -358,6 +364,8 @@ def status_all() -> list[dict]:
         online = bool(is_online)
         detail = "Online" if online else "Offline"
 
+    state = _load_state()
+    budget_seconds = state.get(dev_id, {}).get("budget", BUDGET_S)
     budget_minutes = _budget_to_minutes(budget_seconds)
 
     # Budget warning
@@ -368,9 +376,36 @@ def status_all() -> list[dict]:
     else:
         icon = dev_info["icon"]
 
-        actions.append({
+    return {
         "icon": icon,
         "title": dev_info["name"],
         "detail": f"{detail} · {budget_minutes} min left",
-        })
+        "online": online,
+    }
+
+
+def status_all() -> list[dict]:
+    """Get current status + budget for all devices. Returns ordered list."""
+    curfew = curfew_status()
+
+    # Check all devices in parallel
+    results = {}
+    with ThreadPoolExecutor(max_workers=3) as executor:
+        futures = {
+            executor.submit(_check_device, dev_id, dev_info): dev_id
+            for dev_id, dev_info in DEVICES.items()
+        }
+        for future in as_completed(futures):
+            dev_id = futures[future]
+            results[dev_id] = future.result()
+
+    # Return in ordered list (DEVICES preserves insertion order)
+    actions = [
+        {
+            "icon": results[dev_id]["icon"],
+            "title": results[dev_id]["title"],
+            "detail": results[dev_id]["detail"],
+        }
+        for dev_id in DEVICES
+    ]
     return actions, curfew