From 47fd83da5789bd8e1205a29c9ba28a336e04d49c Mon Sep 17 00:00:00 2001
From: Bobby Holley <bobbyholley@gmail.com>
Date: Wed, 24 May 2017 15:48:43 +0200
Subject: [PATCH] Add a fast path for eq_ignore_ascii_case.

---
 components/style/gecko_string_cache/mod.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/style/gecko_string_cache/mod.rs b/components/style/gecko_string_cache/mod.rs
index fa89f5eab48..4973428f1e8 100644
--- a/components/style/gecko_string_cache/mod.rs
+++ b/components/style/gecko_string_cache/mod.rs
@@ -239,6 +239,10 @@ impl Atom {
 
     /// Return whether two atoms are ASCII-case-insensitive matches
     pub fn eq_ignore_ascii_case(&self, other: &Self) -> bool {
+        if self == other {
+            return true;
+        }
+
         let a = self.as_slice();
         let b = other.as_slice();
         a.len() == b.len() && a.iter().zip(b).all(|(&a16, &b16)| {