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Performance tools for Flutter

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These tests were disabled in https://github.com/flutter/tests/pull/406 due to the long runtime. In the meantime, we should select a set of tests that are representative of things we'd like to run...

testing
P1
cost: medium

The lighter gray is getting passed in by the query parameters from the IDE, but it is not getting applied everywhere: ![Screenshot 2024-08-22 at 1 47 06 PM](https://github.com/user-attachments/assets/cf6121ab-251d-4db9-a75d-22e94f1ee201) ![Screenshot 2024-08-22...

polish
fix it friday
ide-integration
P2
cost: low

For example, this URL causes DevTools to continue using dark mode (though it does respect the font size param): ``` http://127.0.0.1:58623/home?theme=light&backgroundColor=FF5733&fontSize=24 ``` This URL with `embedMode=one` causes DevTools to switch...

P2
cost: low
cross-screen

Hovering over field with a primitive type doesn't provide any extra information. Eg: ![Screenshot 2022-12-02 at 10 24 01 AM](https://user-images.githubusercontent.com/21270878/205360752-6b9e7c05-c365-400e-a792-963b5649b47f.png) It might make sense to never show a hovercard for...

screen: inspector
fix it friday
bug bash
P2
cost: low

___ **DevTools version**: 2.37.3 **IDE**: VSCode **Connected Device**: CPU / OS: x64 (64 bit) android Connected app type: Flutter native (debug build) Dart Version: 3.5.3 Flutter Version: 3.24.3 / stable...

screen: network
P2

Make a simple closure and assign it to a variable, e.g: `var foo = () {};` If you pause the debugger and inspect the variables the closure is displayed. However,...

screen: debugger
P3
reproduce to verify

Currently, only plain text can be shown by calling `Notifications.of(context).push('message')`. We'd want to support clickable links as well for places where we'd want to link to an external site for...

P3
cross-screen

I'm fixing https://github.com/flutter/flutter/issues/60013. Using DevTools to look at where the TextStyle is coming from. ![Screen Shot 2020-08-11 at 9 57 38 PM](https://user-images.githubusercontent.com/156888/89976586-ac3c0b80-dc1d-11ea-9ca8-f76cd3e5262d.png) Not clear from the UI how to do...

screen: inspector
P3

User feedback from https://github.com/flutter/devtools/issues/1000. Show whether a function is async and how long it is waiting. @bkonyi is there a way for us to get this information?

cpu profiler
new feature
P3

Observatory has a really cool UI where you can expand and collapse the code snippet around each frame in the stack. This makes it easier to understand where you are...

screen: debugger
observatory migration
P3