Optimize away a .clone().

sunfishcode · sunfishcode · commit 5ce67143e61f · 2025-01-10T17:01:58.000-08:00
diff --git a/examples/http_server.rs b/examples/http_server.rs
@@ -71,7 +71,7 @@ async fn http_bigfail(_request: Request<IncomingBody>, responder: Responder) ->
 
 async fn http_echo_headers(request: Request<IncomingBody>, responder: Responder) -> Finished {
     let mut response = Response::builder();
-    *response.headers_mut().unwrap() = request.headers().clone();
+    *response.headers_mut().unwrap() = request.into_parts().0.headers;
     let response = response.body(empty()).unwrap();
     responder.respond(response).await
 }

Original file line number	Diff line number	Diff line change
`@@ -71,7 +71,7 @@ async fn http_bigfail(_request: Request<IncomingBody>, responder: Responder) ->`
`71`	`71`
`72`	`72`	`async fn http_echo_headers(request: Request<IncomingBody>, responder: Responder) -> Finished {`
`73`	`73`	`let mut response = Response::builder();`
`74`		`- *response.headers_mut().unwrap() = request.headers().clone();`
	`74`	`+ *response.headers_mut().unwrap() = request.into_parts().0.headers;`
`75`	`75`	`let response = response.body(empty()).unwrap();`
`76`	`76`	`responder.respond(response).await`
`77`	`77`	`}`