This is ApacheBench version 0.63, a Perl API for Apache benchmarking and regression testing. This project is meant to be the foundation of a complete benchmarking and regression testing suite for a transaction- processing mod_perl site. We needed to be able to stress our server to its limit while also having a way to verify the HTTP responses for correctness. We also extended the single-URL ab model to a multiple-URL sequence model. ApacheBench is based on the Apache 1.3.12 ab code (src/support/ab.c). Since the initial release, I have made efforts to merge in all the newest features of ab. As of version 0.62 it has almost all the features of Apache 1.3.22 ab. Please see the POD for complete details. NOTE: For people upgrading from 0.5x, please see the file README.upgrading_0.5x-0.6x. There have been changes to the API, so your scripts based on 0.5x will not work with 0.6x unless you make some modifications to them. Adi Fairbank adi@adiraj.org February 26, 2003