From 9b2ba3d7134b4ec33c5a57e69faf48408d44ee74 Mon Sep 17 00:00:00 2001
From: Corey Farwell <coreyf@rwell.org>
Date: Sat, 4 Jul 2015 18:41:47 -0700
Subject: [PATCH] Join Atoms without requiring intermediate Vec

Related to: https://github.com/servo/string-cache/pull/89
---
 components/script/dom/attr.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/components/script/dom/attr.rs b/components/script/dom/attr.rs
index 0c8e92f7d42..a8f4b897f15 100644
--- a/components/script/dom/attr.rs
+++ b/components/script/dom/attr.rs
@@ -49,7 +49,11 @@ impl AttrValue {
     }
 
     pub fn from_atomic_tokens(atoms: Vec<Atom>) -> AttrValue {
-        let tokens = atoms.iter().map(|x| &**x).collect::<Vec<_>>().connect("\x20");
+        let tokens = atoms.iter().fold(String::new(), |mut s, atom| {
+            if !s.is_empty() { s.push('\x20'); }
+            s.push_str(atom);
+            s
+        });
         AttrValue::TokenList(tokens, atoms)
     }