From d9c9d4ab369c09dae378cb886b9dc7409f114c8f Mon Sep 17 00:00:00 2001
From: Corey Farwell <coreyf@rwell.org>
Date: Sat, 2 Jul 2016 16:50:11 -0400
Subject: [PATCH] Only allocate a `HashMap` if we need to.

---
 components/util/prefs.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/components/util/prefs.rs b/components/util/prefs.rs
index a197a1544c6..d0d96a93035 100644
--- a/components/util/prefs.rs
+++ b/components/util/prefs.rs
@@ -15,7 +15,7 @@ use std::sync::{Arc, Mutex};
 
 lazy_static! {
     pub static ref PREFS: Preferences = {
-        let prefs = read_prefs().unwrap_or(HashMap::new());
+        let prefs = read_prefs().unwrap_or_else(|_| HashMap::new());
         Preferences(Arc::new(Mutex::new(prefs)))
     };
 }