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docker/routlin-dash/app/config_utils.py

@@ -25,10 +25,20 @@ DASHB_INTERVAL_SECS  = 60
 QUEUE_MAX_LINES      = 50
 
 
+_config_cache = None
+_config_mtime = None
+
 def load_config():
+    global _config_cache, _config_mtime
     try:
+        mtime = os.path.getmtime(CONFIG_FILE)
+        if _config_cache is not None and mtime == _config_mtime:
+            return copy.deepcopy(_config_cache)
         with open(CONFIG_FILE) as f:
-            return json.load(f)
+            data = json.load(f)
+        _config_cache = data
+        _config_mtime = mtime
+        return copy.deepcopy(data)
     except Exception:
         return {}