AJAX web applications bring a variety of rich user experiences to the web, but often those experiences require downloading a lot of code. The result is applications that are frustratingly slow to load and taxing to web servers.

Today we are announcing the availability of Doloto on MSDN DevLabs. Doloto is a tool that makes pages more responsive by decreasing the initial download size of complex AJAX web applications.

Doloto analyzes AJAX application workloads and automatically performs code splitting of existing large web applications. Doloto enables applications to initially transfer only the portion of client-side JavaScript code necessary for application initialization. The rest of the application’s code is replaced by short stubs; their actual function code is transferred lazily in the background or on-demand on first execution. Since code download is interleaved with application execution, users can start interacting with your web application much sooner without waiting to download code that implements features they’re not currently using.