Shortened datalink timeout from 100ms to 1ms so that COV handler task, which has by default 255 subscriptions and 5 states (almost 2 minutes to process all subscriptions at 100ms per task cycle), would get through the states quickly. Doesn't appear to negatively impact any performance (as tested on Win32 XP and Linux).

bacnet-stack/demo/server/main.c

@@ -151,7 +151,7 @@ int main(
         0
     };  /* address where message came from */
     uint16_t pdu_len = 0;
-    unsigned timeout = 100;     /* milliseconds */
+    unsigned timeout = 1;     /* milliseconds */
     time_t last_seconds = 0;
     time_t current_seconds = 0;
     uint32_t elapsed_seconds = 0;