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Performance tools for Flutter

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fixes https://github.com/flutter/devtools/issues/7183

- When running `flutter test test/app_that_uses_foo_test.dart --start-paused ` , the `package:foo` DevTools extension does not load - When running `flutter run test/app_that_uses_foo_test.dart --start-paused -d flutter-tester`, the `package:foo` DevTools extension does...

devtools extensions
P1

I noticed this issue while I was measuring the performance of my package with a benchmarking app (like a stress test) by someone else. I'm not sure if this is...

Right now we disable analytics for non-release builds, but to build DevTools with the devtools server we have to build the DevTools app in release mode (at least right now)....

analytics
P2

I am analyzing CPU profile and I would like to search by some words. For example, to highlight frames from certain library. It would be great to be able to...

cpu profiler
P3

On web, it passes but then hangs indefinitely and requires `ctrl+c` to quit the test: On the CI bots, it fails: https://github.com/flutter/devtools/actions/runs/7730688845/job/21076721585?pr=7144 Logs when running locally ``` dart run integration_test/run_tests.dart...

testing
integration tests
P2

Right now you can only access DevTools pages from a debug session's list of available devtools screens. However, some tools like the Deep Links and App Size tool do not...

P2
flutter sidebar

Right now this is a manual process to take the `NEXT_RELEASE_NOTES.md` file from DevTools and create a PR like https://github.com/flutter/website/pull/10113. This could easily be done by a script.

infra
fix it friday
hurts-developer-velocity
P3

___ **DevTools version**: 2.28.4 **IDE**: VSCode **Connected Device**: CPU / OS: arm64 (64 bit) android Connected app type: Flutter native (debug build) Dart Version: 3.2.3 Flutter Version: 3.16.3 / stable...