وقفه عجیب در کل برنامه زمان بارگذاری های سنگین در برنامه

سلام مشکلی که پیش اومده در فلاتر اینه که زمانی که درخواست نمایش یک ویدجت سنگین رو میدیم کل برنامه دچار یک وقفه میشه و تعاملات برنامه تا پایان اون وقفه تحت تاثیر قرار میگیره ، مثال رو آوردم ، توی این مثال سعی کردم با استفاده از Visbility یک صفحه سنگینی رو لود کنم و با لود یک صفحه سبک تر مقایسه کردم :

https://user-images.githubusercontent.com/7369151/125171550-16608600-e1ca-11eb-8aad-b674a2aae49d.mp4

حتی راه وجود نداره که بخوایم در پس این وقفه کاری انجام بدیم و تقریبا همه چیز متوقف میشه تا عملیات انجام بشه و بعدش هرکاری خواستیم بکنیم ، میتونم اینجوری بگم که نیاز داریم به معنای واقعی کلمه مولتی تردینگ اتفاق بیوفته مثل جاوااسکریپت ولی .....

کدی که استفاده کردم :

// ignore_for_file: sized_box_for_whitespace

import 'package:arsa_shop_admin/HeavyPage.dart';

import 'package:arsa_shop_admin/TinyPage.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

class MainPage extends StatefulWidget {
  const MainPage({Key? key}) : super(key: key);

  @override
  _MainPageState createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> {
  // final _bodyScaffold = GlobalKey();
  bool hide = false;

  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Column(
      children: [
        ElevatedButton(
          style: ElevatedButton.styleFrom(padding: const EdgeInsets.all(20)),
          onPressed: () {
            setState(() {
              hide = !hide;
            });
          },
          child: const Text("Toggle"),
        ),
        Container(
          width: 50,
          height: 50,
          padding: const EdgeInsets.symmetric(vertical: 10),
          child: const CircularProgressIndicator(),
        ),
        Container(
          width: 500,
          height: 300,
          decoration:
              BoxDecoration(border: Border.all(color: Colors.black, width: 1)),
          child: Stack(
            children: [
              Visibility(
                child: const HeavyPage(),
                visible: hide,
              ),
              Visibility(
                child: const TinyPage(),
                visible: !hide,
              ),
            ],
          ),
        ),
      ],
    ));
  }
}

flutter doctor :;

[✓] Flutter (Channel master, 2.4.0-1.0.pre.94, on Ubuntu 20.04.2 LTS
    5.8.0-59-generic, locale en_US.UTF-8)
    • Flutter version 2.4.0-1.0.pre.94 at /home/mrtdeh/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision ba143ae21e (3 days ago), 2021-07-06 22:01:02 -0700
    • Engine revision 60eea42346
    • Dart version 2.14.0 (build 2.14.0-284.0.dev)
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /media/mrtdeh/softwares/android-tools
    • Platform android-30, build-tools 29.0.3
    • ANDROID_HOME = /media/mrtdeh/softwares/android-tools
    • ANDROID_SDK_ROOT = /media/mrtdeh/softwares/android-tools
    • Java binary at: /usr/bin/java
    • Java version OpenJDK Runtime Environment (build
      1.8.0_292-8u292-b10-0ubuntu1~20.04-b10)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at google-chrome

[!] Android Studio (not installed)
    • Android Studio not found; download from
      https://developer.android.com/studio/index.html
      (or visit https://flutter.dev/docs/get-started/install/linux#android-setup
      for detailed instructions).

[✓] VS Code (version 1.57.1)
    • VS Code at /usr/share/code
    • Flutter extension version 3.24.0

[✓] Connected device (1 available)
    • Chrome (web) • chrome • web-javascript • Google Chrome 91.0.4472.114

! Doctor found issues in 1 category.

pubspec.yaml :

name: arsa_shop_admin
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.12.0 <3.0.0"

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  get: ^4.1.4

dev_dependencies:
  build_runner: ^2.0.6
  build_web_compilers: ^3.2.0
  build_test: any
  flutter_test:
    sdk: flutter

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^1.0.0

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

روی تمام موررگر ها امتحان کردم فایده نداشت
روی حالت های اجرا و بیلد هم تست کردم بازم خیر
و این وقفه برای ویدجت های دیگه ای مثل offstage , opacity , pageView , indexedStack , و خلاصه هر ویدجتی که امکان نمایش یا عدم نمایش میده این مشکل صدق میکنه .

با تشکر از سایت خوبتون.
در ضمن این مشکل رو در گیتهاب فلاتر گزارش کردم اینجا.