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Clojure and Rails - the Secret Sauce Behind FlightCaster

FlightCaster, a realtime flight delay site, is built on Clojure and Hadoop for the statistical analysis. The web frontend is built with Ruby on Rails and hosted on Heroku. We talked to Bradford Cross about Clojure, functional programming and tips for OOP developers interested in making the jump.

Werner Schuster
on Aug 20, 2009
WebSphere vs. .NET: IBM and Microsoft Go Head to Head

After carrying out a number of benchmarks, Microsoft concluded that .NET offers better performance and cost-performance ratio than WebSphere. IBM rebutted Microsoft’s findings and carried out other tests proving that WebSphere is superior to .NET. Microsoft responded by rejecting some of IBM’s claims as false and repeating the tests on different hardware with different results.

Abel Avram
on Aug 17, 2009
Performance Analysis and Monitoring with Perf4J

In this article Alex Devine explains how Java developers can take advantage of Perf4J, an open source toolset for adding code timing statements and for logging, analyzing and monitoring the results. Alex introduces several aspects of Perf4J like integration with Log4J, use of annotations, pitfalls and good practices.

Alex Devine
on Apr 23, 2009
Eight Isolation Levels Every Web Developer Should Know

In this article, James Leigh takes a look at eight different isolation levels that can be utilized within a web application, and explores the pros and cons of each level of isolation, ranging from read uncommitted to serializable consistency - the interactions between transactions at different isolation levels is also looked at.

James Leigh
on Mar 15, 2009
SharePoint Object Model Performance Considerations

In this article, Andreas Grabner analyzes the performance implication of using the SharePoint Object Model, specifically displaying and editing lists, one of the most used SharePoint objects.

Andreas Grabner
on Mar 04, 2009
Using the Concurrency and Coordination Runtime

Nick Gunn provides a practical introduction the Concurrency and Coordination Runtime for .NET. CCR radically changes the way multi-threaded applications are written in .NET, shifting the focus from threads and locks to lightweight, asynchronous tasks.

Nick Gunn
on Jan 28, 2009
Performance Anti-Patterns in Database-Driven Applications

In this article, Alois Reitbauer, a Performance Architect for dynaTrace Software, specifies several architectural anti-patterns which can downgrade an application’s performance. Knowing those anti-patterns and proactively designing the application to avoid them will keep away certain snags that can impact application’s performance.

Alois Reitbauer
on Jan 05, 2009
A Formal Performance Tuning Methodology: Wait-Based Tuning

In this article, Steven Haines talks about web application performance tuning which used to be more of an art than science. He proposes a method called wait-based tuning, making the entire process more measurable and, consequently, more scientific.

Steven Haines
on Oct 06, 2008
Using Ruby Fibers for Async I/O: NeverBlock and Revactor

Rails 2.2 is schedule to be thread safe - but will blocking I/O libraries make it necessary to run multiple Ruby instances? We take a look at how non-blocking I/O and Ruby 1.9's Fibers help solve the problem. We talked to Mohammad A. Ali of the NeverBlock project and Tony Arcieri of the Revactor project.

Werner Schuster
on Aug 28, 2008
Scalability Worst Practices

In this article, former Orbitz lead architect Brian Zimmer discusses scalability worst pratices. Topics covered include The Golden Hammer, Resource Abuse, Big Ball of Mud, Dependency Management, Timeouts, Hero Pattern, Not Automating, and Monitoring.

Brian Zimmer
on Aug 18, 2008
Building Scalability and Achieving Performance: A Virtual Panel

Join our industry-heavyweight (eBay, Betfair, FiveRuns and Twitter) panel as they explore the cost of making their sites as scalable as possible, whilst tuning to get the most performance they possibly can. They explore the pros-and-cons of making their apps as awesome as possible - all the while under the pressure of their business requirements.

James Cox
on Jul 22, 2008
Do Java 6 threading optimizations actually work? - Part II

Features like biased locking, lock coarsening, lock elision by escape analysis and adaptive spin locking are all designed to increase concurrency by allowing more effective sharing amongst application threads. But do they actually work? In this two part article, Jeroen Borgers explores these features and attempt to answer the performance question with the aid of a single threaded benchmark.

Jeroen Borgers
on Jun 27, 2008

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