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Create BytesMut for Json with initial capacity (#1196)

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* Create BytesMut for Json with initial capacity

* Add a comment explaining BytesMut initial capacity

* Update link to serde_json::to_vec function to docs.rs
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Ryan Fowler 2022-07-26 10:45:58 -04:00 committed by GitHub
parent 3bcc8fb07d
commit 7e7a2f2058
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1 changed files with 3 additions and 1 deletions
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4
axum/src/json.rs
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@ -186,7 +186,9 @@ where
T: Serialize, T: Serialize,
{ {
fn into_response(self) -> Response { fn into_response(self) -> Response {
let mut buf = BytesMut::new().writer(); // Use a small initial capacity of 128 bytes like serde_json::to_vec
// https://docs.rs/serde_json/1.0.82/src/serde_json/ser.rs.html#2189
let mut buf = BytesMut::with_capacity(128).writer();
match serde_json::to_writer(&mut buf, &self.0) { match serde_json::to_writer(&mut buf, &self.0) {
Ok(()) => ( Ok(()) => (
[( [(