A down side of durable messaging

Overview Durable messaging can be very fast, as fast as non-durable messaging up to a point. Limitations of durable messaging…

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High Performance Durable Messaging

Overview While there are a good number of high performance messaging systems available for Java, most avoid quoting benchmarks which…

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Java Memory Model and optimisation

Overview Many developers of multi-threaded code are familiar with the idea that different threads can have a different view of…

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Should Java be more high level or low level?

Overview Java 8 is bringing much antisipated features such as Lambda expressions, Type Annotations and Virtual Extensions. While this functionality…

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Local variables inside a loop and performance

Overview Sometimes a question comes up about how much work allocating a new local variable takes.  My feeling has always…

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Can synchronization be optimised away?

Overview There is a common misconception that because the JIT is smart and synchronization can be eliminated for an object…

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Java Object resurrection

Overview After an object which overrides finalize() is collected it is added to a finalization queue to be cleaned up…

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Performance of inlined virtual method invocations in Java

Overview One of the benefits of dynamic compilation it the ability to support extensive method inlining on virtual method code.…

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When using direct memory can be faster

Overview Using direct memory is no guarantee of improving performance.  Given it adds complexity, it should be avoided unless you…

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