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Performance tools for Flutter

Results 668 devtools issues
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**[See Observatory -> DevTools Tracking Issue](https://github.com/flutter/devtools/issues/3858).** DevTools should allow for inspecting the following data in the memory pane: - [x] New + old space statistics - [ ] GC statistics...

memory page
P5
observatory migration
missing vm-developer functionality

**[See Observatory -> DevTools Tracking Issue](https://github.com/flutter/devtools/issues/3858).** Performance tooling functionality from Observatory that’s not present in DevTools: - [ ] Changing between code/function CPU profiles - [ ] Call tree filtering...

performance page
missing core functionality
observatory migration
missing vm-developer functionality

Tracking issue for the Observatory migration effort. **Core Functionality** - [ ] https://github.com/flutter/devtools/issues/3859 - [ ] https://github.com/flutter/devtools/issues/3861 - [ ] https://github.com/flutter/devtools/issues/3862 - [ ] https://github.com/flutter/devtools/issues/3867 - [ ] https://github.com/flutter/devtools/issues/3869 -...

observatory migration

**[See Observatory -> DevTools Tracking Issue](https://github.com/flutter/devtools/issues/3858).** Feature requests from discussion @chinmaygarde and I had offline. These features are currently in Observatory and are used by the Engine team for debugging...

timeline page
observatory migration
missing vm-developer functionality

It's currently not possible to select text from entries in a table, making it difficult to copy-paste things like file paths from stack traces. cc @liamappelbe

table component
polish
usability
copy behavior
P2
product-quality

When we use fixed widths for table columns, it can lead to a lot of unused space: ![Screen Shot 2020-06-05 at 2 17 34 PM](https://user-images.githubusercontent.com/43759233/83923682-9ac71680-a737-11ea-947a-dfe5d2e8ada1.png)

polish

Here the frame took 160ms but build+layout is over 300ms. Looking at the timeline, It seems like the value for build is calculated incorrectly or the two times can overlap...

bug
performance page

![](https://github.com/flutter/devtools/issues/2081) THis is a test