Manages persistent connections using Net::HTTP including a thread pool for connecting to multiple hosts. 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 make setting up a single persistent connection or managing multiple connections easy. Net::HTTP::Persistent wraps Net::HTTP and allows you to focus on how to make HTTP requests.