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A whole new thing called ‘Web 2.0′ has arisen along with the AJAX phoenix. AJAX can improve responsiveness of networked applications by getting the client to do more work. But the first request from and the first download to the client-side cache can incur a dramatic performance hit.
Microsoft Research boffins have been cogitating on this, and have produce a PDF paper discussing Doloto, a system that analyzes application workloads and automatically performs code splitting of existing large Web 2.0 applications.
Since code download is interleaved with application execution, users can start interacting with the Web application much sooner, without waiting for the code that implements extra, unused features, using the Doloto framework, the team writes.