Back to newsletter 031 contents

We are branching out from our successful on-site training courses to provide public courses. From current demand, our first course is likely to be in London, UK. If you are interested in Java performance training in London, please contact us.

1.5 seems to be nearly a year away? So I hear. And 1.6 is likely to be three years away. So if you want to get any features voted in to 1.5 you'd better do it now. Misha Dimitriev, the author of the JFluid technology I mentioned last month, wants your help to get JFluid technology voted in to 1.5. In case you forgot, this is a Sun project, and the technology would enable standard HotSpot JVMs to be dynamically attached to at any time for profiling. No slowdown when not attached, but profiling possible at any time. That looks pretty good to me. Go and vote (needs account, registration is free, it may take a couple of days before the bug appears in the database).

We are trying to move to a more weekly publishing mode. The newsletter will still only be emailed once a month, but individual columns will become available earlier, on a weekly basis. Plus we should have some new tips every week. You can track this by visting the home page or the newsletter page if you like to get your updates more frequently than once a month.

A note from this newsletter's sponsor

This year, I've decided to extract the tips from the JavaOne presentations. I don't normally, because despite the 20-30 or so performance related presentations available each year, the target is broad based education; the presentations rarely have anything new to say about performance in the way of new tips, i.e tips that are not already detailed here at JavaPerformanceTuning.com.

And despite this year being the same, I felt that the interest surrounding Java's premier annual event justified spending the time on the JavaOne presentations. Certainly they are interesting, especially the architecture case studies. It is good to see that Java is the basis behind so many really big enterprise sites (EBay, CapitalOne, WSJ.com, more). So check the presentations I've covered, and with our new weekly format, I'll cover more in the coming weeks.

We also present our regular features this month. Kirk's roundup covers garbage collection, store checkouts, stateless beans, and much more including a really curious synchronization code snippet. This month's interview is with Philip Aston and Peter Zadrozny of BEA Systems. Our question of the month is about using import statements;

Javva The Hutt is on holiday, but of course we have nearly 100 new performance tips extracted in concise form.
(Note: Backlogged articles still growing.)

A note from this newsletter's sponsor

News

Java performance tuning related news.

• Java performance is now "good enough," and development resources are being shifted to other goals, such as stability and quality.
• Why Java Sound still has timing problems
• Jade UTF8 speedup
• Java vs C# encryption speed test (Java 44% faster)
• Java vs C# reg exp speed test (Java orders of magnitude faster)
• GemStone GemFire distributed cache enables high performance scalable system
• JProbe review
• Report showing what features application servers support, including focus on the performance effects of pools
• Volano JVM performance report updated
• IBM APERA performance modeling and evaluation, resource allocation, and capacity planning for Java applications
• What may be new in JVM 1.5: new profiling API accommodates dynamically enabled and disabled profiling; negligible performance impact when profiling is disabled; low overhead when profiling is enabled; shared JVM support; lots more.
• Testmaker 4.0 now available
• HP sets new specjbb2000 record
• FastUtil has moved home

A note from this newsletter's sponsor

Tools

• JADE. Many optimized packages: XML parser, readers/writers, string manipulators
• Client Perceived Response Time, for measuring web service performance a from client perspective
• Eclipse memory monitor plugin
• Primitive collections

Recent Articles: JavaOne presentations

• Case Study of a High-Volume Account Servicing Application Using J2EE Technology (Carol McDonald, Joseph Paulchell/Sun)
• How J2EE Technology, Open Standards and Open Source Brought You the Architecture of the Miller Time Network (John Haro/Sun)
• Graphics Performance Writing Optimized Client Applications (Scott Violet, Joshua Outwater, Chet Haase/Sun)
• Performance Tuning the Sun ONE Application Server (David Dagastine, Eileen Loh, Scott Oaks, Martin Zaun/Sun)
• Optimizing EJB Performance in High-Volume Data-Warehousing Applications Patterns, Strategies and Best Practices (Samrat Ray, Arunabh Hazarika/Sun)
• A Billion Hits a Day (Deepak Alur, Rajmohan Krishnamurthy, Arnold Goldberg/Sun)
• Measuring Java 2 Platform, Enterprise Edition (J2EE) Application Performance in Production (Geoff Vona/Sun)
• Garbage Collection in the Java HotSpot Virtual Machine (John Coomes, Tony Printezis/Sun)

Jack Shirazi

Back to newsletter 031 contents