This is Varnish Cache, the high-performance HTTP accelerator.
This fork of even more powerful version from bbcelly contains new utility lsvstats. lsvstats is fast varnish log analyzer to measure performance of varnish on various objectes defined by regular expression in config.
Documentation and additional information about Varnish is available on http://www.varnish-cache.org/
Technical questions about Varnish and this release should be addressed to varnish-misc@varnish-cache.org.
Questions about commercial support and services related to Varnish should be addressed to sales@varnish-software.com.