Hi Ara. Great Work, really useful. ACGI is great for webservers without fcgi support. I've managed acgi to work with fnord, a super small(13k static binary) and fast webserver and indeed, benchmarking gave me impressing results. Standard cgi is around 20 req/s as expected and acgi around 120-150 req/s . What do you think about running multiple ruby servers, each with its own ipc. The index.cgi tries each server to acquire a lock and chooses the first free one. Should improve performance for non-trivial cgis. Cheers, Matthias