# DevTools 2.20.0 release notes

> Release notes for Dart and Flutter DevTools version 2.20.0.



The 2.20.0 release of the Dart and Flutter DevTools
includes the following changes among other general improvements.
To learn more about DevTools, check out the
[DevTools overview](https://docs.flutter.dev/tools/devtools).

## CPU profiler updates

* Add support for grouping samples by tag -
  [#4693](https://github.com/flutter/devtools/pull/4693)

  ![samples by tag](/assets/images/docs/tools/devtools/release-notes/images-2.20.0/4693.png "samples by tag")

* Enable guidelines for tree view -
  [#4722](https://github.com/flutter/devtools/pull/4722)

  ![guidelines](/assets/images/docs/tools/devtools/release-notes/images-2.20.0/4722.png "guidelines")

* Rename "Profile granularity" to "CPU sampling rate"
  and move down to the area it relates to -
  [#4803](https://github.com/flutter/devtools/pull/4722)

  ![sampling rate](/assets/images/docs/tools/devtools/release-notes/images-2.20.0/4803.png "sampling rate")


## Memory updates

* Retire the **Analysis** tab -
  [#4714](https://github.com/flutter/devtools/pull/4714)

* Add a new tab, **Diff**, to enable memory leak detection
  and troubleshooting by comparing heap snapshots,
  providing insights about the number of instances,
  shallow size, retained size, and retaining paths -
  [#4714](https://github.com/flutter/devtools/pull/4714)

  ![diff](/assets/images/docs/tools/devtools/release-notes/images-2.20.0/4714.png "Diff in Memory tab")

## Debugger updates

* Support for inspecting more types of instances in the variables viewer
  (Expandos, Types, TypeArguments, Parameters, Closures + closure Contexts,
  WeakProperty, Function, FunctionType, ReceivePort, Closure, RegExp) -
  [#4760](https://github.com/flutter/devtools/pull/4760)

* Add support for displaying coverage in CodeView -
  [#4700](https://github.com/flutter/devtools/pull/4700)

  ![coverage](/assets/images/docs/tools/devtools/release-notes/images-2.20.0/4700.png "coverage in CodeView")

## Network updates

* Display request data if content type is not json
  (thanks to @leungpuikuen!) -
  [#4602](https://github.com/flutter/devtools/pull/4602)

## Full commit history

To find a complete list of changes since the previous release,
check out
[the diff on GitHub](https://github.com/flutter/devtools/compare/v2.19.0...v2.20.0).