devtools devtools memory section issues

i wanted to use memory trace tool in devtools and stumbled upon these issues

(see video) chart sometimes does not correspond with memory values. on the video see on the graphics parameter, but if i recall correctly, i also saw other showing this behavior - this is applicable to both debug and profile modes
(see video) yellow selection bar position is starting to drawn incrorrectly after the chart fills the screen entirely, but numbers are shown "correctly". to speed up the reproduction process you can zoom in the page
bar position should be drawn immediately after click. currently it feels really undersponsive and makes you feel really uncomfortable during its usage
it's really hard to distungish different parameters on chart
legend colors do not match colors on chart:
- graphics is orange in legend, yellow on chart (when it's not overlayed, see the first video)
- java has entirely different green hue
- stack is grey on chart, white in legend

reproduction app with video i used to test https://github.com/nt4f04unds-archive/issues/tree/flutter_78128

flutter doctor -v

[✓] Flutter (Channel nt4f04und, 2.1.0-12.0.pre, on Microsoft Windows [Version 10.0.19041.867], locale ru-RU)
    • Flutter version 2.1.0-12.0.pre at c:\dev\src\flutter
    • Framework revision 698d438960 (5 days ago), 2021-03-09 07:53:21 +0100
    • Engine revision 2441c476a6
    • Dart version 2.13.0 (build 2.13.0-116.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2)
    • Android SDK at C:\Users\danya\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.2
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[!] Visual Studio - develop for Windows (Visual Studio Community 2019 16.7.7)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.7.30621.155
    • Windows 10 SDK version 10.0.18362.0
    ✗ Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop
      development with C++" workload, and include these components:
        MSVC v142 - VS 2019 C++ x64/x86 build tools
         - If there are multiple build tool versions available, install the latest
        C++ CMake tools for Windows
        Windows 10 SDK

[✓] Android Studio (version 4.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 50.0.1
    • Dart plugin version 193.7547
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[✓] VS Code (version 1.54.2)
    • VS Code at C:\Users\danya\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.20.0

[✓] Connected device (4 available)
    • Redmi Note 5 (mobile) • 40c9f14 • android-arm64  • Android 9 (API 28)
    • Windows (desktop)     • windows • windows-x64    • Microsoft Windows [Version 10.0.19041.867]
    • Chrome (web)          • chrome  • web-javascript • Google Chrome 89.0.4389.82
    • Edge (web)            • edge    • web-javascript • Microsoft Edge 89.0.774.50

! Doctor found issues in 1 category.

https://user-images.githubusercontent.com/39104740/111054800-98d97300-8480-11eb-9339-c4cc043132c2.mp4

https://user-images.githubusercontent.com/39104740/111054812-c0304000-8480-11eb-82b3-f4627d97b964.mp4

Mar 14 '21 02:03 nt4f04uNd

flutter doctor -v

[✓] Flutter (Channel stable, 2.0.2, on Mac OS X 10.15.4 19E2269 darwin-x64,
    locale en-GB)
    • Flutter version 2.0.2 at /Users/dhs/documents/Fluttersdk/flutter
    • Framework revision 8962f6dc68 (4 days ago), 2021-03-11 13:22:20 -0800
    • Engine revision 5d8bf811b3
    • Dart version 2.12.1

[!] Xcode - develop for iOS and macOS
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 12.3, Build version 12C33
    ! CocoaPods 1.9.3 out of date (1.10.0 is recommended).
        CocoaPods is used to retrieve the iOS and macOS platform side's plugin
        code that responds to your plugin usage on the Dart side.
        Without CocoaPods, plugins will not work on iOS or macOS.
        For more info, see https://flutter.dev/platform-plugins
      To upgrade see
      https://guides.cocoapods.org/using/getting-started.html#installation for
      instructions.

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] VS Code (version 1.54.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.18.1

[✓] Connected device (3 available)
    • iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729 • ios
      • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
    • macOS (desktop)            • macos                                •
      darwin-x64     • Mac OS X 10.15.4 19E2269 darwin-x64
    • Chrome (web)               • chrome                               •
      web-javascript • Google Chrome 89.0.4389.82

! Doctor found issues in 1 category.

Mar 15 '21 13:03 darshankawar

Transferring this issue to dedicated repo. If this isn't correct, please write in comments and we can have it back in flutter/flutter repo.

Apr 05 '22 12:04 darshankawar