I've been doing some quick and dirty shootouts running the Petstore app from TW-commons RubyForge project. The purpose of this exercise was not to draw any conclusions, but to get a gut feel for the various factors that have significant impact on performa
In the search for the best regular expression (or regex) parser available for Java, I had to satisfy myself by doing some benchmarks. The following table shows the typical results for the following four regular expression matches.