Skip to main content

Dart 1.1 features up to 25% faster Javascript

Better performance, more features, and improved tools mark the 1.1 release of Dart. Just two months after the 1.0 release, this new release delivers a set of compatible updates that makes applications easier to develop and faster for end users.




Dart’s Javascript output continues to shine. Performance on the Richards benchmark is 25% better than the first release, making runtime comparable to the original JavaScript. Performance of the newest benchmark, FluidMotion, has doubled since November. Dart2js now generates Javascript that performs as well as, if not better than, the idiomatic Javascript equivalent.

While there’s a lot of focus on Dart for browser applications, there is also growing interest in Dart for server solutions. This release provides a number of enhancements for server-side Dart, including support for large files, file copying, process signal handlers, and terminal information. New in this release is support for UDP, which, for example, allows developers to write more efficient media streaming apps.

The Dart Editor has added a number of features to increase productivity. Developers will find improved debugging, better code completion, and more descriptive tooltips. Overall performance of the Editor and the analyzer has also improved.

Take a look at the updated Dart language spec. You may also be interested in new articles on command-line applications, Dart-Javascript interoperability, and Streams.

We’re excited about the new features now available in Dart 1.1. Tell us what you build with Dart in our Google+ community and let us know if you have any issues or feature requests.

Popular posts from this blog

Dart in 2016: The fastest growing programming language at Google, 2nd fastest growing in TIOBE Index

Dart was the fastest growing programming language at Google in 2016 with millions of lines of code written. It also made it to TIOBE Index Top 20 this month (see TIOBE's methodology).

It takes time to build something as ambitious as Dart and, in some ways, Dart is still in its infancy. But we're glad the hard work is starting to pay off.

Many thanks to our amazing community!

We're going to celebrate by ... releasing 1.22 next week (as per our usual 6 week release schedule).

The new Google AdSense user interface: built with AngularDart

AdSense is a free, simple way to earn money by placing ads on your website. The team just launched a completely new version of their app for publishers. Read all about it here. We asked Daniel White, the tech lead for the project, some questions because the new UI happens to be built with Dart and Angular2.


AdSense launched way back in 2003. How long is it since the last big redesign?
Last big redesign was called ‘AdSense 3’ and launched about 6 years ago. It was written in Google Web Toolkit (GWT) and the UI has evolved through several iterations - but this is the first ground-up redesign in 6 years. There are a number of long-standing UX issues that we’ve taken the opportunity to solve. A big shout-out to our UX team who’ve been 100% behind this project. We couldn’t have done it without them!

How many software engineers worked on the project?
Purely on the AdSense applications, we have a team of close to 100. Around 25% of them write Dart.

How many lines of code?
We have around 160K LO…

A stronger Dart for everyone

We are constantly asking ourselves:
How do we make developers even more productive when writing Dart apps? We believe that a critical part of the answer to this question is to make strongmode – a sound static type system for Dart – the standard for all Dart developers.

Teams that use Dart to build apps like Soundtrap, AdWords, AdSense, and Greentea say they really enjoy using strong mode features, such as early error detection. In fact, teams that have switched completely to strong mode cite not only early error detection but also better code readability and maintainability as major benefits. We hear this both from small teams and Рeven more so Рfrom large teams with hundreds of developers writing and maintaining millions of lines of Dart code. As Björn Sperber from Soundtrap says,
Strong mode and the smooth integration with IntelliJ is a joy to use and a huge improvement. If you’ve tried out Flutter, you’ve already used strong mode checks from the Dart analyzer.

Given the benefits …