优化性能

face_rec.py

@@ -1440,6 +1440,8 @@ class FaceRecognitionSystem:
                     self.logger.error(f"处理WebSocket消息错误: {e}")
                     self.ws_connected = False
                     break
+
+                await asyncio.sleep(0.01)  # 短暂延迟，避免 CPU 空转
         except Exception as e:
             self.logger.error(f"WebSocket消息处理任务异常: {e}")
             self.ws_connected = False
@@ -1551,14 +1553,32 @@ class FaceRecognitionSystem:
         stream_check_counter = 0
         stream_check_interval = 150  # 每150帧（约5秒）检查一次
 
+        # 帧率控制
+        target_fps = 30
+        frame_interval = 1000 // target_fps  # 每帧间隔毫秒
+        last_frame_time = time.time() * 1000
+
+        # 清理定时控制
+        last_cleanup_time = time.time()
+
         # 添加人脸消失计数器
         no_face_counter = 0
         no_face_threshold = 30  # 连续30帧（约1秒）没有检测到人脸才清空
 
         try:
             while True:
-                # 定期清理过期记录，防止内存无限增长
-                self.cleanup_expired_records()
+                current_time = time.time()
+
+                # 每60秒清理一次过期记录，防止内存无限增长
+                if current_time - last_cleanup_time >= 60:
+                    self.cleanup_expired_records()
+                    last_cleanup_time = current_time
+
+                # 帧率控制：控制到约30fps
+                elapsed = time.time() * 1000 - last_frame_time
+                if elapsed < frame_interval:
+                    await asyncio.sleep((frame_interval - elapsed) / 1000)
+                last_frame_time = time.time() * 1000
 
                 # 检查机器人角色并显示/隐藏视频
                 self._check_role_and_display_video()