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Evaluating Ajax Efficiency: Bandwidth, Waiting Time, and Task Completion

This study investigates the efficiency of Ajax technology by analyzing its impact on bandwidth consumption, waiting times for data transmission, and overall task completion. Utilizing a testing environment with specific hardware and Microsoft Web Application Stress Tool, we measured average bytes received and transmission times during various tasks. Results indicate that while Ajax can reduce data transmission significantly, it may lead to higher waiting times due to excessive request firing and slower JavaScript execution. Conclusions recommend case-by-case evaluation for Ajax implementation.

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Evaluating Ajax Efficiency: Bandwidth, Waiting Time, and Task Completion

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  1. Analyzing the efficiency of Ajax Liang Zhou lz2276@columbia.edu

  2. Evaluation criteria • Bandwidth consumed for the entire task • Time spent waiting for data to be transmitted • Time spent completing a particular task

  3. Testing • Testing environment A computer with a Intel Pentium M 1700MHZ CPU and 1000MB Memory running Windows XP SP2 as server machine, the client machine is similar. There is one wireless router between these two machines. • Testing tool Microsoft Web Application Stress Tool DynaTrace Ajax Edition

  4. Sample applications

  5. The average number of bytes received in a single request

  6. The average time spent on data transmission

  7. Ajax may slow down the browser • Ajax enable us to fire request off excessively • Many JavaScript running time slow • The DOM operation is known to be slow • Many other JavaScript is slower than Java/c#, and php.

  8. Test result on Google Search

  9. Another issue revealed by the experiment • Ajax enable us to fire request off excessively

  10. Conclusion • Ajax reduced the number of data transmitted • Ajax saved the transmission time remarkably • the use of the Ajax should be on a case by case basis

  11. References • [1] Jesse James Garrett, Ajax: A New Approach to Web Applications, Feb 2005 • [2] David Teare, An introduction to Ajax, Dev2Dev, Aug 2005 • [3] Brett McLaughlin, Mastering Ajax part1, IBM, Dec 2005 • [4] Chris Schalk, A Hype-Free Introduction to Ajax, Oracle, April 2006 • [5] W3shool JavaScript Tutorial • http://www.w3school.com.cn/js/ • [6] Dennis Lembree, Ajax and Web Accessibility, Nov 2008 • [7] W3school Ajax Tutorial • http://www.w3schools.com/ajax/default.asp

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