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Question: How can I measure performance of my servlets/JSP pages?

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Question: How can I measure performance of my servlets/JSP pages?

Answer: JMeter from jakarta.apache.org is simple, free and efficient.
There are several more from http://www.servletsuite.com/servlets/stress.htm

Stress tool for your web applications: lets you to test your servlets/JSP pages. Supports session simulation, so you may test your real applications.

How does it work? Describe your host (set URI), define if you need sessions simulation (through cookies or URL rewriting), set parameters in case you are using post request and set hits intensity. Package simulates users activity based on the Puasson distribution. Intensity you set is an average amount hits per second (it may be non-integer, e.g. 0.5 means 30 hits per minute etc.). With the time step one second within the model time interval package calculates visitors count for this interval and generates a bundle of requests.

What you will get? Statistics for successful and failed requests and raw file with data for the each request: when it was (model time) and what was response time (real time or special mark for failed requests).
Package Stress distributed as a one jar file. Main class is StressTest. So - add jar file to your class path and run Stress.StressTest. Class requires one parameter - text file described your test configuration.

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