From 027cb71b7b05a8ac5589a029bff6ad2a2a66b3ff Mon Sep 17 00:00:00 2001
From: Sean McArthur <sean.monstar@gmail.com>
Date: Thu, 2 Feb 2017 13:13:48 -0800
Subject: [PATCH] perf(http): reduce a copy when not using Chunked encoding

---
 src/http/io.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/http/io.rs b/src/http/io.rs
index 643b5cfb..067f384e 100644
--- a/src/http/io.rs
+++ b/src/http/io.rs
@@ -242,8 +242,12 @@ impl<T: Write + ::vecio::Writev> AtomicWrite for T {
 */
 impl<T: Write> AtomicWrite for T {
     fn write_atomic(&mut self, bufs: &[&[u8]]) -> io::Result<usize> {
-        let vec = bufs.concat();
-        self.write(&vec)
+        if bufs.len() == 1 {
+            self.write(bufs[0])
+        } else {
+            let vec = bufs.concat();
+            self.write(&vec)
+        }
     }
 }
 //}