Joakim Dahlstedt

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In the past six years or so the claim that Java is a slow language has regularly appeared in articles and news discussions. Most of the time I follow the debate, but after a while I get bored because the discussions remain at the micro-benchmark level. It continues to amaze me that there isn't more focus on system-level performance in discussions of language performance. Having spent seven years actively interested in the field of runtime system optimization and the past four years designing a server-side JVM, JRockit, I am pretty convinced that micro-benchmark results cannot be extended to the system level, where performance really matters. Thus, I thought it would be interesting to give you a view of the performance issue from a JVM developer perspective. I'm arguing that Java is anything but a slow and inefficient language, and that the JVM is the key component ... (more)