Google has unveiled new version of Web Toolkit, an open source development toolkit used by developers for building and optimising complex browser-based applications. The company said that the improvements in browser speed and capabilities enable larger and richer web applications, but also require better development tools to take full advantage of them.

Google Web Toolkit 2.0 features include: speed tracer, a new tool built using modern HTML5 technologies that allows developers to diagnose performance problems in the browser; code splitting, which enables developers to safely and easily slice and dice their application code so that key functionality can load immediately and other features can be loaded later as needed; UiBinder, which is a new declarative UI framework that enables design iteration and a clean separation between presentation layer and application logic.

Andrew Bowers, product manager at Google, said: Google Web Toolkit’s performance and productivity enhancements have been tried and tested over the past year with Google teams that are pushing the boundaries of web apps products like Google Wave and AdWords 3.0.

Ben Fried, chief information officer at Google, said: We use Google Web Toolkit for all our Java-based internal apps. In addition to the big benefits in developer productivity GWT offers, the future-proofing and browser independence you get out of the box mean that we’re protected from the problems caused by browser-specific bugs and exploits.