diff --git a/lib/main.dart b/lib/main.dart
index 2941477..378f6cf 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -126,6 +126,7 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   int _resumeRecoveryToken = 0;
   DateTime? _backgroundedAt;
   late ShellBranding _shellBranding;
+  final DateTime _shellStartedAt = DateTime.now();
 
   _H5LineWebViewSlot get _currentSlot => _lineSlot;
 
@@ -426,6 +427,22 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     debugPrint('[H5LineDebug] $message');
   }
 
+  int get _elapsedSinceShellStartMs =>
+      DateTime.now().difference(_shellStartedAt).inMilliseconds;
+
+  void _logShellPerfBridge(Map<dynamic, dynamic> decoded) {
+    final label = decoded['label']?.toString() ?? 'unknown';
+    final status = decoded['status']?.toString() ?? 'info';
+    final duration = decoded['durationMs'];
+    final detail = decoded['detail'];
+    final durationText = duration == null ? '' : ' ${duration}ms';
+    final detailText = detail == null ? '' : ' detail=${jsonEncode(detail)}';
+    debugPrint(
+      '[H5PerfBridge] +${_elapsedSinceShellStartMs}ms '
+      '$label $status$durationText$detailText',
+    );
+  }
+
   bool _isCurrentLineGeneration(int generation) {
     return generation == _lineGeneration;
   }
@@ -475,6 +492,8 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
         _hideShellCover(generation);
       } else if (decoded is Map && decoded['type'] == 'keyboard-bridge-ready') {
         unawaited(_syncKeyboardState());
+      } else if (decoded is Map && decoded['type'] == 'perf-log') {
+        _logShellPerfBridge(decoded);
       } else if (decoded is Map && decoded['type'] == 'openExternalUrl') {
         unawaited(_openExternalUrl(decoded['url']?.toString()));
       }
@@ -514,6 +533,8 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
           unawaited(openAppSettings());
         case 'keyboard-bridge-ready':
           unawaited(_syncKeyboardState());
+        case 'perf-log':
+          _logShellPerfBridge(decoded);
         case 'openExternalUrl':
           unawaited(_openExternalUrl(decoded['url']?.toString()));
       }