Using AJAX to Improve the Bandwidth Performance of Web Applications
Christopher L Merrill have written a very intersting article at web performance about Performance Impacts of AJAX Development and how to using AJAX to Improve the Bandwidth Performance of Web Applications. The test was to compare bandwidth usage between a traditional application using page refresh and an AJAX version, the bandwidth saving was up to 60%. This is a trivial concept because AJAX don't have to reload all page data but only the needed pieces to update with new content.
In order to test the theory, we decided to see if we could cut the bandwidth use of an application by at least 50%. We selected a rather simple internal data-analysis application. The application consists of a typical page layout with a central section containing the changing content. The header, footer and navigation menu do not change during the application operation. We modified the application so that it can be accessed in either traditional (page-refresh) mode or AJAX mode. We then used our measurement tool (Web Performance Analyzer) to record and analyze the bandwidth utilization of each application.
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