Rich Internet Application Performance

HTML-based applications became popular because the cost of development and deployment were low, the architecture was simple. Certain applications , however, are not a good fit with HTMLo Complex applications may require several page redraws to complete a transaction, and in certain fields such as medicine and finance, this can mean unacceptably slow interaction.For the last two years or so, interest has been building in the idea of a "rich client": a user interface that is more robust, responsive and visually interesting than what can be achieved with HTMLo Rich Internet Application (RIA) technologies allow us to deploy rich clients over the internet with Web-like simplicity.Rich Internet applications combine the responsiveness and richness of desktop software with the broad reach of web applications to deliver a more effective user experience. The following are some of the available RIA technologies: Microsoft Smart Client, MacroMedia Flex, Mozilla XUL and so on.,Regardless of the technology we choose, there are some concerns about performance when we create RIAs: Fetch data in a background thread. The performance expectations for a rich client are high, and if the application pauses while collecting data from a Web service, it will seem unresponsive . Keep the client in sync with the remote data., Because you are no longer constantly refreshing pages, it's important to "push" data changes to the client asynchronously, if possible. Create a visually interesting and functional UI with quick initialization and timely response.In this paper, Flex1.5 is used as example to research its performanceo And later GenericReportCenter whose presentation layer is based on Flex will be studied from performance perspective to research RIA's performance issues.