Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.ginnisw.com/irish3.htm
Description:
"Civil registration of all births, marriages and deaths in Ireland became mandatory in 1864. Non-Catholic marriages were recorded from 1845. Prior to that time, baptism and marriage records were kept at the churches. Most churches did not keep records of deaths. The civil records are all indexed by year. Beginning in 1878, they are also indexed by quarter."