Since March, software development firm TechEmpower has been running benchmark tests on well-known Web application server frameworks and publishing the results. They just published the results of the seventh round of testing, and Java-based frameworks like Gemini, Grizzly, Undertow, and Vertx led the pack. Many other popular choices like Ruby on Rails, Django, Sinatra for Ruby and various ASP.Net frameworks did fairly poorly.
However, InfoWorld's Serdar Yegulalp cautions that performance doesn't tell the whole story. "As much as Oracle would like to think otherwise, developers choose a given framework for plenty of reasons other than raw performance. Ease of development, time to release, developer affinity, and third-party community involvement are all at least as crucial."