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Tag Archives: Performance

HOWTO: Increase performance in your application

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If there’s one thing that developers hate it’s seeing your piece of code becoming a performance hog. That piece of code that does it’s job beautifully, comes crashing down when there’s a load test. That definitely does make a developer very, very, frustrated. My team recently had to go through a piece of beautifully written (NOT!), performance hogging pieces of ...

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Java High CPU troubleshooting guide – part 1

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This article is part 1 of a series that will provide you with a comprehensive guide on how you can troubleshoot and identify root cause of Java high CPU problems. This guide is also applicable for standalone Java programs but designed to help individuals involved in day to day Java EE enterprise production support. It will also include the list ...

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MongoDB performance testing

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So, this morning I was hacking around in the mongo shell. I had come up with three different ways to aggregate the data I wanted, but wasn’t sure about which one I should subsequently port to code to use within my application. So how would I decide on which method to implement? Well, lets just chose the one that performs ...

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Application Performance and Antipatterns

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Any application you pick up, there are some issues – big or small. There will be copy-paste code, mistakes, algorithms which could have better thought through. But what distinguishes an antipattern from these normal errors is that like patterns these antipatterns are recurring throughout the code base. In my recent experience in dealing with performance issues, I had observed certain ...

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High Performance Webapps – Data URIs

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I continue to write tips for perfomance optimization of websites. The last post was about jQuery objects. This post is about data URIs. Data URIs are an interesting concept on the Web. Read ” Data URIs explained” please if you don’t know what it does mean. Data URIs are a technique for embedding resources as base 64 encoded data, avoiding ...

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JMeter: Load Testing Relational Databases

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Apache JMeter is a performance testing tool which is entirely written in Java. Any application that works on request/response model can be load tested with JMeter. A relational database is not an exception: receives sql queries, executes them and returns the results of the execution. I’am going to show you how easy it is to set up test scenarios with ...

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Building High Performance Applications

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Performance is one word which is used to describe multiple scenarios’ when talking about the application performance. When someone says, I need a High Performance Application; it might mean any/all of the following : Low Web latency Application ( meaning low Page Loading times)  Application that can serve ever increasing number of users (scalability)  Application that does not go down ...

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Hibernate Performance Tips: Dirty Collection Effect

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After 8 years developing server and embedded applications using Hibernate as ORM, squeezing my brain seeking solutions to improve Hibernate performance, reading blogs and attending conferences, I decided to share this knowledge acquired during these years with you. This is the first post of many more posts to come: Last year I went to Devoxx as speaker but also I ...

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Recycling objects to improve performance

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Overview In a previous article I stated that the reason the deserialization of objects was faster was due to using recycled objects. This is potentially surprising for two reasons, 1) the belief that creating objects is so fast these days, it doesn’t matter or is just as fast as recycling yourself, 2) None of the serialization libraries use recycling by ...

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High Performance JPA with GlassFish and Coherence – Part 3

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In this third part of my four part series I’ll explain strategy number two of using Coherence with EclipseLink and GlassFish. This is all about using Coherence as Second Level Cache (L2) with EclipseLink. General approach This approach applies Coherence data grid to JPA applications that rely on database hosted data that cannot be entirely pre-loaded into a Coherence cache. ...

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