[carmen]

this is in the parser files in puma: * Copyright (c) 2005 Zed A. Shaw

puma's README wording make it seem like the Ragel parser is some new thing unique to Puma, and doesnt mention Zed. no wonder he hatest rubyists

also, thin has had a --threaded flag for years

[mattgreenrocks]

Thin's --threaded flag is still considered experimental. Also, spawning a native OS thread per incoming connection is not cheap, either.

[getsat]

At high numbers of concurrent connections, your thread stacks consume a non-trivial amount of ram, too.