Jack Shirazi is the author of O'Reilly's "Java Performance Tuning" and director of the popular website JavaPerformanceTuning.com/, the world's premier site for Java performance information. Jack writes articles for many magazines, usually about Java performance related matters. He also oversees the output at JavaPerformanceTuning.com, publishing around 1 000 performance tips a year as well as many articles about performance tools, discussion groups, and much more. In his earlier life Jack also published work on protein structure prediction and black hole thermodynamics, and contributed to some Perl5 core modules "back when he had more time".