在CameraImage流中使用WebSocket时，相机渲染缓慢

Question

在图像流中使用websocket时，Flutter相机应用程序的渲染速度非常慢。如何提高应用程序性能？克服此问题的最佳方法是什么？在模拟器上，它工作得很好，但在实际设备上，存在很多延迟和卡顿现象。我们可以在相机应用中使用异步吗？如果是，该如何在代码中使用它？

    import 'dart:async';
    import 'package:flutter/material.dart';
    import 'package:camera/camera.dart';
    import 'package:web_socket_channel/io.dart';
    import 'dart:convert';
    import 'package:archive/archive.dart';

    List<CameraDescription> cameras;
    Future<void> main() async {
      cameras = await availableCameras();
      runApp(App());
    }
    class App extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        return MaterialApp(
          title: 'Title',
          theme: ThemeData(

            primarySwatch: Colors.teal,
          ),
          home: CameraApp(),
        );
      }
    }
    class CameraApp extends StatefulWidget {
      @override
      _CameraAppState createState() => _CameraAppState();
    }
    class _CameraAppState extends State<CameraApp> {
      CameraController controller;
      IOWebSocketChannel channel =   IOWebSocketChannel.connect('ws://192.168.0.6:8000/');
      @override
      void initState() {
        super.initState();
        controller = CameraController(cameras[1], ResolutionPreset.low);
        controller.initialize().then((_) async{
          await controller.startImageStream((onAvailable) {            
             sd(onAvailable);
          });
          if (!mounted) {
            return;
          }
          setState(() {});
        });
      }
      @override
      void dispose() {
        controller?.dispose();
        super.dispose();
      }
      @override
     void sd(onAvailable) {
        var framesY =  onAvailable.planes[0].bytes;
        List<int> gzipBytes =  new GZipEncoder().encode(framesY);
        String compressedString = base64Encode(gzipBytes);
        channel.sink.add(compressedString);
      }
      Widget build(BuildContext context) {
        if (!controller.value.isInitialized) {
          return Container();
        }
        return new Scaffold(
          body: new Container(
            child: new AspectRatio(
              aspectRatio: controller.value.aspectRatio,
              child: new CameraPreview(controller),
            ),
          ),
        );
      }
    }