Latest news

NEW: DECEMBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "That's an interesting shift for tuners - you need to minimize or eliminate RAM usage when your application is idle, but you don't want to impact perceived speed of response"
• All the latest Java performance tips extracted in concise form
  • "StandardOpenOptions include options that allow delete-on-close, sparse files, and keeping the contents automatically synced with the underlying storage device" and "Choosing monitoring granularity (the interval between samples) is a balance between too much data and finding out about problems later than ideal"

NOVEMBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "The overhead is low and stability high, because HotRockit Mission Control basically accesses the internal counters of the JVM to derive the data it is displaying, and for the most part those counters are used by the JVM itself"
• All the latest Java performance tips extracted in concise form
  • "It is impossible to predict all nontrivial bottlenecks, deadlocks, and potential memory leaks from design or code review; it's also impossible to find memory leaks with unit and integration tests." and "Soft references are for quick and dirty caching; weak references are for fast cleanup; phantom references are for safe cleanup."
• A new cartoon by "profiler". This month: use the latest evolution of your JVM

OCTOBER NEWSLETTER

• We list all the latest Java performance related news and articles
  • "Martin Thompson's Single Writer Principle is a useful design principle that I'm happy to recommend"
• All the latest Java performance tips extracted in concise form
  • "Do not make your concurrency algorithm depend on Thread.yield()" and "The most common Java performance issues are: poor choice of algorithms or data structures; unnecessary object allocation; unnecessary object retention; using unbuffered I/O; poorly tuned JVMs; high lock contention; data structures resizing."

Previous newsletters

All our previous newsletters can be viewed from here

How to use this site

This site has four main information resources:

• The uncategorized tips page lists many other web pages with Java performance tuning related information. Each web page has its performance tuning tips extracted and listed immediately after the URL is listed. These tips are being categorized, and the tips page links to those categories currently available. If the performance area you are interested in is not yet categorized, send us an email from this page telling us the categorization you'd like to see. In any of the tips pages, use your browser's "find" or "search" option to identify particular tips you are interested in on the page, and follow up by reading the referenced web page if necessary or desired.
• The resources page lists Java performance tuning resources including books, tools, reports, other performance tuning sites of interest, and Java performance tuning discussion groups.
• The news pages are monthly newsletters listing any new Java performance tuning related information, together with Kirk Pepperdine's discussion group roundup and Javva The Hutt.
• The tool reports pages are detailed introductory reports on various Java performance related tools, for both free and commercial tools.

This site has been designed to download almost as fast as possible. (Some stylistic markup and required server-side processing has been used in preference to absolute speed contraints.) The web tree contains very few graphics and almost no complex typesetting markup except for very simple tables, and the main pages can be accessed directly from the menu.

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