Benchmark hyper server against rust-http server.

Adds a benchmark for testing the speed of hyper's server.

Due to limitations of rust-http, `cargo bench` now needs to be
killed after running because there is no way to kill a rust-http
server after you start it.

benches/server.rs

@@ -0,0 +1,66 @@
+// You have to ctrl-C after running this benchmark, since there is no way to kill
+// a rust-http server.
+
+extern crate http;
+extern crate hyper;
+extern crate test;
+
+use test::Bencher;
+use std::io::net::ip::{SocketAddr, Ipv4Addr};
+
+use http::server::Server;
+
+static phrase: &'static [u8] = b"Benchmarking hyper vs others!";
+
+fn request(url: hyper::Url) {
+    let req = hyper::get(url).unwrap();
+    req.send().unwrap().read_to_string().unwrap();
+}
+
+fn hyper_handle(mut incoming: hyper::server::Incoming) {
+    for (_, mut res) in incoming {
+        res.write(phrase).unwrap();
+        res.end().unwrap();
+    }
+}
+
+#[bench]
+fn bench_hyper(b: &mut Bencher) {
+    let server = hyper::Server::http(Ipv4Addr(127, 0, 0, 1), 0);
+    let listener = server.listen(hyper_handle).unwrap();
+
+    let url = hyper::Url::parse(format!("http://{}", listener.socket_addr).as_slice()).unwrap();
+    b.iter(|| request(url.clone()));
+    listener.close().unwrap();
+}
+
+static mut created_http: bool = false;
+
+#[deriving(Clone)]
+struct HttpServer;
+
+impl Server for HttpServer {
+    fn get_config(&self) -> http::server::Config {
+        http::server::Config {
+            bind_address: SocketAddr {
+                ip: Ipv4Addr(127, 0, 0, 1),
+                port: 4000
+            }
+        }
+    }
+
+    fn handle_request(&self, _: http::server::Request, res: &mut http::server::ResponseWriter) {
+        res.write(phrase).unwrap();
+    }
+}
+
+#[bench]
+fn bench_http(b: &mut Bencher) {
+    if unsafe { !created_http } { spawn(proc() { HttpServer.serve_forever() }); unsafe { created_http = true } }
+    // Mega hack because there is no way to wait for serve_forever to start:
+    std::io::timer::sleep(std::time::duration::Duration::seconds(1));
+
+    let url = hyper::Url::parse("http://localhost:4000").unwrap();
+    b.iter(|| request(url.clone()));
+}
+