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Author Archives: Vladimir Sor

Vladimir Sor
Vladimir Šor is a technical founder of Plumbr. “How to detect performance bottlenecks with minimal overhead? How to identify and trace down root causes with no direct access to source code?“ - these are the questions Vladimir has managed to solve and keeps solving for further Plumbr releases.

Amdahl’s law illustrated

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The article will explain the Amdahl’s law in simple terms. We are going to demonstrate via a case study how throughput and latency are changing when you change the number of threads performing the tasks. We also help to draw right conclusions in the context of your own performance tuning task at hand. First of all, let’s refresh our memory ...

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Selecting your Collections library

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Is this really something you should bother? Is there something fundamentally wrong with java.util.ArrayList and java.util.HashMap? For most of the source code out there the answer is – no; those implementations are perfectly OK. But as always, the devil is in the details. And there exist situations when either the feature set built into the Collections API is not sufficient ...

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Should I use a 32- or a 64-bit JVM?

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This is a question I have faced several times during my career in enterprise software development. Every once in awhile I’ve had to hand out recommendations for configuring a specific new environment. And more often than not, part of the question at hand was related to “Should I use a 32- or a 64-bit JVM”. To be honest, in the ...

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