Tag Archives: performance

Java Performance: synchronized() vs Lock

By Bryan Duxbury | Published: June 16, 2011

Yesterday, I noticed that one of our systems was using a Lock where a plain old synchronized() block would suffice, and I thought to myself, does this matter? Since the Lock was already fulfilling the same role, the only real question was performance. My gut told me that there should be a performance difference between [...]

Posted in java | Also tagged | 7 Comments

Analyzing network load in Map/Reduce

By Bryan Duxbury | Published: August 24, 2010

Hadoop Map/Reduce can put a heavy toll on your network. Just how heavy, though, isn’t obvious. This is an especially important consideration when you are expanding your cluster. Rapleaf recently encountered this situation, and in the process we devised a neat theoretical model for analyzing how network topology affects Map/Reduce. When does Hadoop put the [...]

Posted in Hadoop | Also tagged | Leave a comment

Reading files quickly in Java

By Bryan Duxbury | Published: August 6, 2010

I came across a really interesting, well-done blog post today about the quickest way to do high-performance file IO in Java. It does a really good job of breaking down the alternatives of how to get bytes into memory, covering both traditional and NIO options in a good amount of detail. It’s a must-read for [...]

Posted in Miscellaneous | Also tagged , | Leave a comment

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