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Cary Millsap's article "Thinking Clearly about Performance" (see our listed articles this month) is quite possibly the best introductory article I have ever read on performance!

I particularly loved the quote from Tom Kyte, that the cost of embedded measurement (for the Oracle database) was minus 10 percent or better - because the knowledge that had been gained from the performance instrumentation had made the application at the very least 10% faster than it would have been without the instrumentation in place.

A note from this newsletter's sponsor

Also, thanks for all your replies to last month's newsletter about whether you still need faster double to string conversion - the answer was a resounding yes, there are many specialist applications that need the extra speed there. Michael Kay the developer of the Saxon XSLT and XQuery Processor also pointed me to the Saxon implementation (see the tools section below) which folded my technique into a more accurate conversion, a useful tool to know about (thanks Michael).

Now on with this month's newsletter and all our usual Java performance tools, news, and article links with, as usual, all the extracted tips from all of this month's referenced articles.

A note from this newsletter's sponsor

News

Java performance tuning related news.

• 6u25 has a number of performance enhancements - but there are indications of hotspot compiler issues, so check the web
• facebook's 200,000 events per second realtime analytics system
• Optimizing Pages with Google Website Optimizer
• Spinning off browser page work into an iframe seems to effectively provides parallel execution of that work within the browser page.

Tools

Java performance tuning related tools.

• fast accurate conversion of doubles to strings
• Oracle Berkeley DB Java Edition is an open source, embeddable, transactional storage engine supporting very high performance and concurrency for both read-intensive and write-intensive workloads.
• A Generic Search result framework
• Google's free website testing and optimization tool

A note from this newsletter's sponsor

Articles

• Thinking Clearly about Performance (Cary Millsap/ACMQueue)
• 10 Tips for Proper Application Logging (Fabrizio Chami/Java Code Geeks)
• 100% CPU with output from jstat (Kirk Pepperdine/kodewerk)
• Yet More Performance Tuning (Kirk Pepperdine/kodewerk)
• Application Performance Monitoring in Production (Michael Kopp/JDJ)

Jack Shirazi

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