Improve the scanning speed

lib/core/common.sh

@@ -553,19 +553,24 @@ run_with_timeout() {
 
     "$@" &
     local cmd_pid=$!
-    local elapsed=0
-    while kill -0 "$cmd_pid" 2> /dev/null; do
-        if [[ $elapsed -ge $duration ]]; then
-            kill -TERM "$cmd_pid" 2> /dev/null || true
-            sleep 1
-            kill -KILL "$cmd_pid" 2> /dev/null || true
-            wait "$cmd_pid" 2> /dev/null || true
-            return 124
-        fi
-        sleep 1
-        ((elapsed++))
-    done
-    wait "$cmd_pid"
+    
+    # More efficient wait: use wait with timeout in subshell
+    (
+        sleep "$duration" &
+        local timer_pid=$!
+        wait "$cmd_pid" 2>/dev/null && kill "$timer_pid" 2>/dev/null && exit 0
+        kill -TERM "$cmd_pid" 2>/dev/null || true
+        sleep 0.5
+        kill -KILL "$cmd_pid" 2>/dev/null || true
+        exit 124
+    ) &
+    local watcher_pid=$!
+    
+    wait "$cmd_pid" 2>/dev/null
+    local exit_code=$?
+    kill "$watcher_pid" 2>/dev/null || true
+    wait "$watcher_pid" 2>/dev/null || true
+    return $exit_code
 }
 
 # Menu display helper