【发布时间】：2020-09-08 15:41:10
【问题描述】：
我需要经常在stable 和master 频道之间切换，以使用一些新功能或能够运行一些项目（如flutter/gallery）。
并且每次我运行命令flutter channel master/stable 后跟flutter upgrade 时，似乎正在下载一个新的 Dart SDK 以及许多其他内容（参见下面的输出），所以，切换来不及了，还要等，连频道之间的时间都是秒！
> flutter channel stable
Switching to flutter channel 'stable'...
git: Your branch is up to date with 'origin/stable'.
git: Switched to branch 'stable'
Successfully switched to flutter channel 'stable'.
To ensure that you're on the latest build from this channel, run 'flutter upgrade'
PS D:\DevLib\Flutter\flutter_course> flutter doctor
Checking Dart SDK version...
Downloading Dart SDK from Flutter engine 6bc433c6b6b5b98dcf4cc11aff31cdee90849f32...
Unzipping Dart SDK...
Building flutter tool...
Running pub upgrade...
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╚════════════════════════════════════════════════════════════════════════════╝
Downloading package sky_engine... 1.6s
Downloading flutter_patched_sdk tools... 6.4s
Downloading flutter_patched_sdk_product tools... 6.4s
Downloading windows-x64 tools... 14.9s
Downloading windows-x64/font-subset tools... 2.3s
Downloading android-arm-release/windows-x64 tools... 1.5s
Downloading android-arm64-profile/windows-x64 tools... 1.9s
Downloading android-arm64-release/windows-x64 tools... 1.5s
Downloading android-x64-profile/windows-x64 tools... 1.9s
Downloading android-x64-release/windows-x64 tools... 1.7s
Doctor summary (to see all details, run flutter doctor -v):
【问题讨论】：
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我没有得到这个问题...如果有的话。通道之间涉及很多东西，需要针对不同平台进行编译，这就是原因。
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切换 stable->master->stable（在几分之一秒内）应该下载 Dart SDK 和所有二进制文件对您来说是否直观（查看最后几行和最后的时间它）一遍又一遍？
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我真的不认为这是直观的......但不是 StackOverFlow 的主题。也许 Reddit 可以更好地处理类似的事情，甚至可以在 Github 上进行报告，并从 Google 团队那里获得反馈。
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MacOS (Linux) 的简单解决方案stackoverflow.com/a/66224133/12118935
标签： flutter