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Next month is my 300th newsletter. That's 25 years of monthly newsletters (with not a month missed) on Java performance. Pages don't stay the same on the web, so almost none of the links and only a few of the sites in my first newsletter are still valid. Back then, Java 1.3 was the latest version!

That first newsletter had 86 tips in it. Most of them still work, though most, on a modern JVM, give such tiny speedups that they're not worth applying. But the first two tips are not only fully applicable, they still provide the biggest speedup you can usually obtain - in any language:

• Start tuning by examining the application architecture for potential bottlenecks
• Architecture bottlenecks are often easy to spot: they are the connecting lines on the diagrams; the single threaded components; the components with many connecting lines attached

Java has only grown stronger over the 25 years of this newsletter - and on with this one now, to all the usual newsletter list of links, tips, tools, news and talks, and as usual I've extracted all the tips into this month's tips page.

A note from this newsletter's sponsor

News

Java performance tuning related news

• Understanding and optimizing your application's memory usage with Memory Analyzer
• Never run more concurrent JDBC calls than the pool can serve comfortably
• Benchmarking and profiling with JMH

Tools

Java performance tuning related tools

• Scripts for parsing and visualizing Java GC logs
• Eclipse data grid - ultra-fast in-memory data processing
• Heapothesys is a collection of JVM garbage collection workloads to compare alternative garbage collection algorithms and configuration choices

Articles

• Essential JVM Heap Settings: What Every Java Developer Should Know (Abhinav Sonkar/ITNEXT)
• Java Perf & Scale: Mastering Techniques for Efficient Applications (Pratik Patel/NLJUG)
• Performance testing how to do it right (James Livingston/JEurope)

Jack Shirazi

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