perf(client): change HttpConnecting to hold Arc<Config> instead of inlined fields

Cargo.toml

@@ -170,6 +170,11 @@ path = "examples/web_api.rs"
 required-features = ["runtime", "unstable-stream"]
 
 
+[[bench]]
+name = "connect"
+path = "benches/connect.rs"
+required-features = ["runtime"]
+
 [[bench]]
 name = "end_to_end"
 path = "benches/end_to_end.rs"

benches/connect.rs

@@ -0,0 +1,34 @@
+#![feature(test)]
+#![deny(warnings)]
+
+extern crate test;
+
+use tokio::net::TcpListener;
+use tokio::runtime::current_thread::Runtime;
+use hyper::client::connect::{Destination, HttpConnector};
+use hyper::service::Service;
+use http::Uri;
+
+#[bench]
+fn http_connector(b: &mut test::Bencher) {
+    let _ = pretty_env_logger::try_init();
+    let mut rt = Runtime::new().unwrap();
+    let mut listener = rt.block_on(TcpListener::bind("127.0.0.1:0")).expect("bind");
+    let addr = listener.local_addr().expect("local_addr");
+    let uri: Uri = format!("http://{}/", addr).parse().expect("uri parse");
+    let dst = Destination::try_from_uri(uri).expect("destination");
+    let mut connector = HttpConnector::new();
+
+    rt.spawn(async move {
+        loop {
+            let _ = listener.accept().await;
+        }
+    });
+
+
+    b.iter(|| {
+        rt.block_on(async {
+            connector.call(dst.clone()).await.expect("connect");
+        });
+    });
+}

src/client/connect/http.rs

@@ -228,6 +228,16 @@ impl<R> HttpConnector<R> {
     }
 }
 
+impl<R: Resolve> HttpConnector<R> {
+    fn invalid_url(&self, err: InvalidUrl) -> HttpConnecting<R> {
+        HttpConnecting {
+            config: self.config.clone(),
+            state: State::Error(Some(io::Error::new(io::ErrorKind::InvalidInput, err))),
+            port: 0,
+        }
+    }
+}
+
 // R: Debug required for now to allow adding it to debug output later...
 impl<R: fmt::Debug> fmt::Debug for HttpConnector<R> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -263,15 +273,15 @@ where
 
         if self.config.enforce_http {
             if dst.uri.scheme_part() != Some(&Scheme::HTTP) {
-                return invalid_url(InvalidUrl::NotHttp);
+                return self.invalid_url(InvalidUrl::NotHttp);
             }
         } else if dst.uri.scheme_part().is_none() {
-            return invalid_url(InvalidUrl::MissingScheme);
+            return self.invalid_url(InvalidUrl::MissingScheme);
         }
 
         let host = match dst.uri.host() {
             Some(s) => s,
-            None => return invalid_url(InvalidUrl::MissingAuthority),
+            None => return self.invalid_url(InvalidUrl::MissingAuthority),
         };
         let port = match dst.uri.port_part() {
             Some(port) => port.as_u16(),
@@ -279,16 +289,9 @@ where
         };
 
         HttpConnecting {
-            state: State::Lazy(self.resolver.clone(), host.into(), self.config.local_address),
+            config: self.config.clone(),
-            handle: self.config.handle.clone(),
+            state: State::Lazy(self.resolver.clone(), host.into()),
-            connect_timeout: self.config.connect_timeout,
-            happy_eyeballs_timeout: self.config.happy_eyeballs_timeout,
-            keep_alive_timeout: self.config.keep_alive_timeout,
-            nodelay: self.config.nodelay,
             port,
-            reuse_address: self.config.reuse_address,
-            send_buffer_size: self.config.send_buffer_size,
-            recv_buffer_size: self.config.recv_buffer_size,
         }
     }
 }
@@ -321,21 +324,6 @@ impl HttpInfo {
     }
 }
 
-fn invalid_url<R: Resolve>(err: InvalidUrl) -> HttpConnecting<R> {
-    HttpConnecting {
-        state: State::Error(Some(io::Error::new(io::ErrorKind::InvalidInput, err))),
-        handle: None,
-        keep_alive_timeout: None,
-        nodelay: false,
-        port: 0,
-        connect_timeout: None,
-        happy_eyeballs_timeout: None,
-        reuse_address: false,
-        send_buffer_size: None,
-        recv_buffer_size: None,
-    }
-}
-
 #[derive(Debug, Clone, Copy)]
 enum InvalidUrl {
     MissingScheme,
@@ -362,23 +350,16 @@ impl StdError for InvalidUrl {
 #[must_use = "futures do nothing unless polled"]
 #[pin_project]
 pub struct HttpConnecting<R: Resolve = GaiResolver> {
+    config: Arc<Config>,
     #[pin]
     state: State<R>,
-    handle: Option<Handle>,
-    connect_timeout: Option<Duration>,
-    happy_eyeballs_timeout: Option<Duration>,
-    keep_alive_timeout: Option<Duration>,
-    nodelay: bool,
     port: u16,
-    reuse_address: bool,
-    send_buffer_size: Option<usize>,
-    recv_buffer_size: Option<usize>,
 }
 
 #[pin_project]
 enum State<R: Resolve> {
-    Lazy(R, String, Option<IpAddr>),
+    Lazy(R, String),
-    Resolving(#[pin] R::Future, Option<IpAddr>),
+    Resolving(#[pin] R::Future),
     Connecting(ConnectingTcp),
     Error(Option<io::Error>),
 }
@@ -389,22 +370,23 @@ impl<R: Resolve> Future for HttpConnecting<R> {
     #[project]
     fn poll(self: Pin<&mut Self>, cx: &mut task::Context<'_>) -> Poll<Self::Output> {
         let mut me = self.project();
+        let config: &Config = &me.config;
         loop {
             let state;
             #[project]
             match me.state.as_mut().project() {
-                State::Lazy(ref resolver, ref mut host, ref local_addr) => {
+                State::Lazy(ref resolver, ref mut host) => {
                     // If the host is already an IP addr (v4 or v6),
                     // skip resolving the dns and start connecting right away.
                     if let Some(addrs) = dns::IpAddrs::try_parse(host, *me.port) {
                         state = State::Connecting(ConnectingTcp::new(
-                            **local_addr, addrs, *me.connect_timeout, *me.happy_eyeballs_timeout, *me.reuse_address));
+                            config.local_address, addrs, config.connect_timeout, config.happy_eyeballs_timeout, config.reuse_address));
                     } else {
                         let name = dns::Name::new(mem::replace(host, String::new()));
-                        state = State::Resolving(resolver.resolve(name), **local_addr);
+                        state = State::Resolving(resolver.resolve(name));
                     }
                 },
-                State::Resolving(future, local_addr) => {
+                State::Resolving(future) => {
                     let addrs =  ready!(future.poll(cx))?;
                     let port = *me.port;
                     let addrs = addrs
@@ -412,24 +394,24 @@ impl<R: Resolve> Future for HttpConnecting<R> {
                         .collect();
                     let addrs = dns::IpAddrs::new(addrs);
                     state = State::Connecting(ConnectingTcp::new(
-                        *local_addr, addrs, *me.connect_timeout, *me.happy_eyeballs_timeout, *me.reuse_address));
+                        config.local_address, addrs, config.connect_timeout, config.happy_eyeballs_timeout, config.reuse_address));
                 },
                 State::Connecting(ref mut c) => {
-                    let sock = ready!(c.poll(cx, &me.handle))?;
+                    let sock = ready!(c.poll(cx, &config.handle))?;
 
-                    if let Some(dur) = me.keep_alive_timeout {
+                    if let Some(dur) = config.keep_alive_timeout {
-                        sock.set_keepalive(Some(*dur))?;
+                        sock.set_keepalive(Some(dur))?;
                     }
 
-                    if let Some(size) = me.send_buffer_size {
+                    if let Some(size) = config.send_buffer_size {
-                        sock.set_send_buffer_size(*size)?;
+                        sock.set_send_buffer_size(size)?;
                     }
 
-                    if let Some(size) = me.recv_buffer_size {
+                    if let Some(size) = config.recv_buffer_size {
-                        sock.set_recv_buffer_size(*size)?;
+                        sock.set_recv_buffer_size(size)?;
                     }
 
-                    sock.set_nodelay(*me.nodelay)?;
+                    sock.set_nodelay(config.nodelay)?;
 
                     let extra = HttpInfo {
                         remote_addr: sock.peer_addr()?,