Avoid allocation when converting to axum's Response (#467)

dpc · web-flow · commit 51ea3b2df7c9 · 2025-01-28T13:40:14.000+11:00
diff --git a/maud/src/lib.rs b/maud/src/lib.rs
@@ -381,11 +381,10 @@ mod axum_support {
 
     impl IntoResponse for PreEscaped<String> {
         fn into_response(self) -> Response {
-            let mut headers = HeaderMap::new();
-            headers.insert(
+            let headers = [(
                 header::CONTENT_TYPE,
                 HeaderValue::from_static("text/html; charset=utf-8"),
-            );
+            )];
             (headers, self.0).into_response()
         }
     }

Original file line number	Diff line number	Diff line change
`@@ -381,11 +381,10 @@ mod axum_support {`
`381`	`381`
`382`	`382`	`impl IntoResponse for PreEscaped<String> {`
`383`	`383`	`fn into_response(self) -> Response {`
`384`		`- let mut headers = HeaderMap::new();`
`385`		`- headers.insert(`
	`384`	`+ let headers = [(`
`386`	`385`	`header::CONTENT_TYPE,`
`387`	`386`	`HeaderValue::from_static("text/html; charset=utf-8"),`
`388`		`- );`
	`387`	`+ )];`
`389`	`388`	`(headers, self.0).into_response()`
`390`	`389`	`}`
`391`	`390`	`}`