Reflection has been improved in the Dart VM. For example, reflectively performing a new invocation on an object is now 20 times faster. The VM, in addition to ia32 and x64, has also been ported to ARM and MIPS.
Debugging performance was improved for stepping in both Dartium and standalone Dart VM. In particular, we have addressed debugger usability issues, such as:
- Stepping into closures, callbacks and emulated functions.
- Stepping across asynchronous invocations.
- Support for top level exception handling.
You can download Dart Editor and Dart SDK from dartlang.org, and we invite you to join the Dartisans community on Google+ and file feature requests and bugs. Our current focus is bug fixing and getting ready for 1.0, so your feedback really counts. We look forward to seeing what you build!