DevTools 2.13.1 release notes

Dart & Flutter DevTools - A Suite of Performance Tools for Dart and Flutter

General Updates

  • This release included a lot of cleanup and reduction in technical debt. The most notable is the completion of our migration to sound null safety. Please see our changelog for a detailed list of commits.
  • Show release notes in embedded versions of DevTools (i.e. when DevTools is embedded in your IDE) - #4053
  • Polish to the DevTools footer - #3989, #4026, #4041, #4076

Performance Updates

  • Added a new feature to help you debug raster jank in your Flutter app. This feature allows you to take a snapshot of the current screen shown in your app, and then break down rendering time for that scene by layer. This can help you identify parts of a scene that are expensive to rasterize - #4046


  • Added a scope setting for “Track Widget Builds”, allowing you to specify whether widget builds should be tracked in your code only or in all code - #4010


CPU Profiler Updates

  • Use package uris instead of file uris in the CPU profiler “Source” column - #3932

Debugger Updates

  • Fix scrolling bug with debugger breakpoints - #4074

Flutter Inspector Updates

  • Add support for displaying flex values larger than 5 in the Layout Explorer - #4055


More details about changes and fixes are available in our changelog.