From 3ac02fdc6ee9cc788be2bde7c2cbae2f09754194 Mon Sep 17 00:00:00 2001
From: Kaede Hoshikawa <futursolo@icloud.com>
Date: Sat, 13 Aug 2022 00:01:00 +0900
Subject: [PATCH] Reduce allocations on string.

---
 packages/yew/src/platform/fmt.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/yew/src/platform/fmt.rs b/packages/yew/src/platform/fmt.rs
index 6583f8b8c5e..1992c12db2a 100644
--- a/packages/yew/src/platform/fmt.rs
+++ b/packages/yew/src/platform/fmt.rs
@@ -132,7 +132,10 @@ impl Stream for BufStream {
         let mut inner = self.inner.borrow_mut();
 
         if !inner.buf.is_empty() {
-            return Poll::Ready(Some(inner.buf.split_off(0)));
+            let mut buf = String::new();
+            std::mem::swap(&mut buf, &mut inner.buf);
+
+            return Poll::Ready(Some(buf));
         }
 
         if let BufStreamState::Done = inner.state {
@@ -189,6 +192,7 @@ where
 {
     type Item = String;
 
+    #[inline]
     fn poll_next(
         self: std::pin::Pin<&mut Self>,
         cx: &mut std::task::Context<'_>,