Java performance tips

Question

I have a program I ported from C to Java. Both apps use quicksort to order some partitioned data (genomic coordinates).

The Java version runs fast, but I\'d like to get

Answer 1

Profile and tune your java program and host machine. Most code follows 80/20 rule. That is 20% of code 80% of time, so find that 20% and make it as fast as possible. For example, the article Tuning Java Servers (http://www.infoq.com/articles/Tuning-Java-Servers) provides a description of drill down from command line and then isolate the problem using tools like Java Flight recorder, Eclipse Memory Analyser, and JProfiler.