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Performance tools for Flutter

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Release notes issue: https://github.com/flutter/devtools/issues/7844 I am hitting this error locally: https://github.com/flutter/flutter/issues/145772, every time at different place of the test.

release-notes-not-required

It is now behind flag `memorySaveLoad`, because saving and loading of snapshots blocks UI and should become async.

memory page
P2

Some of our integration tests have recently become quite flaky. Looking at the past failures on `master`: ### `integration_test/test/live_connection/service_extensions_test.dart` * example: https://github.com/flutter/devtools/actions/runs/9767563965/job/26963163313 * failure message: ``` A SemanticsHandle was active...

This depends on https://github.com/dart-lang/test/issues/2246 being resolved and all test bootstrap generators being updated with the new changes to add a `packageConfigLocation` constant.

release-notes-not-required

This issue collects user feedback on leak tracking user stories. MVP tracking: https://github.com/flutter/devtools/issues/6909 Bigger issue: https://github.com/flutter/devtools/issues/3951 Design doc (draft): https://docs.google.com/document/d/1hlGY6HnsH5EJhpQDFm-_e-Sr9euQf6jE74TxkqDxhGY/edit?resourcekey=0--7J08lEADd6HpaTGC1B-Pw

P3

Hi With the previous versions SDK 3.19.5 - devtool 2.31.1 , I was able to see all the request in the Network Tab. ![image](https://github.com/flutter/devtools/assets/5365388/9e8231c7-88da-4b17-8c4f-0f84587793b9) Now with SDK 3.22.1 I can...

When you start DevTools, Network can't listen to network requests https://github.com/flutter/devtools/assets/122137647/34d8dbdc-deda-40e9-abc5-95a46b29a8db InternetAddress is always displayed with no network requests ![image](https://github.com/flutter/devtools/assets/122137647/b885a568-adb0-45fc-9cf4-b26cc1c2fa47) ``` version: 1.0.41+41 environment: sdk: ">=3.2.3

Fixes https://github.com/flutter/devtools/issues/7911 ![hidden_groups](https://github.com/flutter/devtools/assets/21270878/74666c34-c6dd-4e00-bc03-7388da96c067)

release-notes-not-required