* http://docs.seattlerb.org/net-http-persistent
* https://github.com/drbrain/net-http-persistent

Manages persistent connections using Net::HTTP plus a speed fix for Ruby 1.8.
It's thread-safe too!

Using persistent HTTP connections can dramatically increase the speed of HTTP.
Creating a new HTTP connection for every request involves an extra TCP
round-trip and causes TCP congestion avoidance negotiation to start over.

Net::HTTP supports persistent connections with some API methods but does not
handle reconnection gracefully.  Net::HTTP::Persistent supports reconnection
and retry according to RFC 2616.

=== 2.2 / 2011-10-24

* Minor Enhancements
  * Added timeouts for idle connections which are set through #idle_timeout.
    The default timeout is 5 seconds.  Reducing the idle timeout is preferred
    over setting #retry_change_requests to true if you wish to avoid the "too
    many connection resets" error when POSTing data.
  * Documented tunables and settings in one place in Net::HTTP::Persistent