Difference between Hot Restart and Hot Reload

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Hi Guys,

I have changed the main.dart file in Flutter. Now I want to update the changes. But I am confused between Hot Reload and Hot Restart. Can anyone tell me the difference between Hot Restart and Hot Reload?

Jul 20, 2020 in Others by akhtar
• 38,240 points
1,053 views

1 answer to this question.

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Hi@akhtar,

In simple Hot Reload with just update the changes in your program. But Hot Restart will again remove your previous state and run the complete program. You can see the below comparison for more information.

Hot Reload

  • Flutter hot reload features works with a combination of Small r key on command prompt or Terminal.
  • Hot reload feature quickly compile the newly added code in our file and sent the code to Dart Virtual Machine. After done updating the Code Dart Virtual Machine update the app UI with widgets.
  • Hot Reload takes less time then Hot restart.
  • There is also a drawback in Hot Reload, If you are using States in your application then Hot Reload preservers the States so they will not update on Hot Reload our set to their default values.

Hot Restart

  • Hot restart is much different than hot reload.
  • In Hot restart, it destroys the preserves State value and set them to their default. So if you are using state value in your application then after every hot restart the developer gets fully compiled application and all the states will be set to their defaults.
  • The app widget tree is completely rebuilt with a new typed code.
  • Hot Restart takes much higher time than Hot reload.
answered Jul 20, 2020 by MD
• 95,340 points

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